EP0705771A1 - Method of and device for producing a double-walled tank - Google Patents

Method of and device for producing a double-walled tank Download PDF

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Publication number
EP0705771A1
EP0705771A1 EP95115142A EP95115142A EP0705771A1 EP 0705771 A1 EP0705771 A1 EP 0705771A1 EP 95115142 A EP95115142 A EP 95115142A EP 95115142 A EP95115142 A EP 95115142A EP 0705771 A1 EP0705771 A1 EP 0705771A1
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EP
European Patent Office
Prior art keywords
tank
welded
sheets
sheet
flat
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Granted
Application number
EP95115142A
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German (de)
French (fr)
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EP0705771B1 (en
Inventor
Martin Quast
Engelbert Quast
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Gebr Quast & Co KG GmbH
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Gebr Quast & Co KG GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
    • B65D90/00—Component parts, details or accessories for large containers
    • B65D90/02—Wall construction
    • B65D90/04—Linings
    • B65D90/041—Rigid liners fixed to the container
    • B65D90/042—Rigid liners fixed to the container fixed pointwise or linewise
    • B65D90/043—Rigid liners fixed to the container fixed pointwise or linewise the liners being in the form of tiles or panels

Definitions

  • the invention relates to a method for producing a double-walled tank from a single-walled tank, in which flat profiles are introduced into the tank and are welded to the inner tank wall and sheets are introduced into the tank and are welded onto the flat profiles.
  • Such a method is known from CH-PS 614 417.
  • a method for the renovation of a single-walled steel tank is disclosed, in which individual sheets are introduced into the tank through the manhole and then the individual sheets are joined to form a jacket and two bottoms. The jacket and base are then used to form a second, liquid-tight tank with an intermediate space to the existing steel tank, which tank holds the liquid to be stored.
  • an elongated slot is provided in the single-walled tank, through which at least the sheets are introduced into the tank, the flat profiles are welded onto several circumferential circles of the tank, the sheets are provided with spacing devices and are only touched with without touching Welded flat profiles.
  • the process according to the invention has the great advantage that relatively large metal sheets can be introduced into the tank and the number of weld seams that have to be made in the tank can be greatly reduced.
  • the metal sheets are not welded directly onto the old tank, but rather are welded onto flat profiles that were previously welded to the tank to be renovated.
  • Providing the sheets with spacing devices makes it possible to use very wide sheet webs without the risk of the sheet being pressed against the outer tank by the internal pressure of the container.
  • the metal sheets are not placed on top of one another in a scale-like manner as in the prior art, but instead are welded onto the flat profiles at a distance from one another, less sheet metal material is required and fewer weld seams are to be carried out over a certain tank length.
  • the method according to the invention thus enables the use of wider sheet metal webs and, in addition, the welding of the sheets at a distance from one another. This will increase the number of welds to be made in the tank greatly reduced and thus the work involved in refurbishing the tank is significantly reduced.
  • cam plates are produced by passing a smooth plate between a lower tool with a large number of bores and an upper tool with a large number of balls on the tool surface.
  • Balls and holes are coordinated in size, shape and arrangement so that when the sheet passes through the tool, the balls emboss cup-like depressions into the sheet. These depressions form cams on the other side of the sheet, which can be designed in different shapes and heights.
  • the height of the cams allows a defined distance between the inner tank and outer tank to be defined. It is recommended to adjust the height of the cams to the thickness of the flat profiles.
  • checker plates can be used as sheets with spacing devices.
  • Commercial checker plates can be obtained cheaply on the market and are more suitable than cam plates for the strong deformation that is necessary in the brim area.
  • the regular elevations on the corrugated side of the sheet serve as spacing devices and prevent the sheet from lying flat against the outer tank.
  • This device has a displaceable carriage on which at least two wheels are attached, on the outer circumference of which a fastening device which can be enlarged in the radial direction is fastened, the device being disassembled into individual parts which can be introduced into the tank through the slot.
  • this device can be introduced into the tank through the manhole or the slot in the tank to be renovated and are assembled there to form a carriage which can be moved along the tank axis.
  • the wheels with the tensioning device can be rotated around the tank axis.
  • This device enables the large, heavy sheets to be brought into the correct position within the tank and braced there. After the sheets have been positioned and braced, it is easy to weld them to the flat profiles.
  • the device allows each sheet to be braced and welded individually. After the first cylinder section of the inner tank is made in the tank, the device is moved longitudinally by means of the carriage in order to use it to close the next sheet position, clamp and weld.
  • the tensioning device which can be enlarged in the radial direction, is an inflatable tube.
  • the sheet metal parts can be easily placed on the radially outermost points of this tube and correctly positioned within the tank by means of the trolley.
  • the hose is inflated with air and presses the sheet against the inner wall of the tank to be renovated.
  • the sheet is clamped in the right place within the tank and can easily be welded to the flat profiles.
  • FIG. 1 the lined inside of the finished lined double-walled tank can be seen as a cutout.
  • a flat profile 2 is welded onto the single-walled tank, which cannot be seen in FIG. 1, and is shown with dashed lines.
  • This flat profile 2 runs on a circumferential circle of the tank and thus has two ends 3 and 4 which run at one point on each other.
  • the length of the flat profiles is dimensioned so that the ends 3 and 4 of the flat profiles do not touch.
  • Cam plates 5 and 6 are welded onto the flat profiles in such a way that the cam plates 5 and 6 each touch the flat profile but do not collide.
  • the cam plates 5 and 6 have evenly distributed cams which are distributed over the entire cam plate.
  • the structure of the double-walled tank can be seen more clearly in FIG.
  • the flat profile 2 On the inside of the tank 1 to be renovated, the flat profile 2 is welded, on which in turn the cam plates 5 and 6 are welded.
  • the cover plate 8 can be seen above this, but is only required in the area of the passage 7.
  • the thickness of the flat profile is as thick as the height of the cams in the plates 5 and 6. This ensures that the cam plates run parallel to the inner wall of the tank 1.
  • FIG. 3 shows the tank 1, in which a rectangular opening 9 is provided in order to introduce the flat profiles and the cam plates into the tank.
  • the relatively large longitudinal extent of the rectangular opening 9 allows wide cam plates to be introduced into the tank which would not have to be introduced into the tank through the manhole.
  • FIG. 4 shows the design of a tank bottom.
  • the dome is formed by two semicircular cam plates 10 and 11, which are chosen so large that they are easy to insert through the opening 9 in the container. Larger domes can also be assembled from more than two sheet segments.
  • the dished bottom consists of several corrugated sheet segments 12, the corrugated sheet side of which points towards the tank wall in order to keep the sheet at a distance from the tank wall. Since checker plates are easier to deform without destroying the spacing devices, checker plates are preferred to the otherwise used cam plates in the brim area.
  • the device 20 shown in FIG. 5 for carrying out the method according to the invention consists of a displaceable carriage 21 which can be displaced on four wheels (only the wheels 22, 23 are shown) in the direction of the longitudinal axis of the tank.
  • the wheels 22, 23 carry an axle 25 via a frame 24.
  • the frame is like this adjustable so that the axis 25 is concentric with the longitudinal axis of the tank.
  • two wheels 26, 27 are fastened whose radial peripheral surfaces 28 and 29 run in the vicinity of the tank wall.
  • a hose 30, 31 is fastened, which lies between the inner wall of the tank 1 and the peripheral surfaces 28, 29 of the wheels 26, 27.
  • the first cam plate 5 is inserted into the tank through the opening 9 and comes to rest on the unpressurized hoses of the device 20.
  • this cam plate 5 can be displaced within the tank 1 in such a way that the side edges 5a and 5b of the cam plate 5 come to rest on the spaced flat profiles 2.
  • the hoses 30 and 31 are then inflated with air to such an extent that the cam plate 5 is pressed firmly against the flat profiles 2. In this process step, it is easy to weld the cam plate 5 to the flat iron 2.
  • a further cam plate 6 is then introduced into the tank 1 in the same way and, in addition to the first cam plate 5, is pressed onto the flat profile 2 at a short distance from the first cam plate 5 and then welded.
  • plates 8 are applied to the passage points 7 and welded, so that the product in the tank 1 only comes into contact with the new sheets and profiles introduced into the tank 1.
  • the bottom parts 10, 11, 12 of the inner tank are likewise introduced into the tank 1 as individual parts and welded to one another and to the frame parts in a conventional manner.
  • the cavity between the inner tank produced by the method according to the invention and the outer tank 1 to be refurbished can be provided with a leak protection device which can detect and report any leaks in the double-walled tank.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Butt Welding And Welding Of Specific Article (AREA)
  • Working Measures On Existing Buildindgs (AREA)
  • Filling Or Discharging Of Gas Storage Vessels (AREA)

Abstract

The prodn. method uses a single-skinned tank (1) to whose inside surface flat profiled members (2) are welded, after which inserted sheet-metal sections (5,6) are welded onto the members. An oblong slot (9) is formed in the single-skinned tank and through which the sheet-metal sections at least are inserted. The members are welded to the tank along several circles. The sheet-metal sections have distance-pieces and do not come into contact with each other, being welded only to the members. When the members are welded into the tank, their ends can be clear of each other, the gap being bridged by a cover plate (8).

Description

Die Erfindung betrifft ein Verfahren zur Herstellung eines doppelwandigen Tanks aus einem einwandigen Tank, bei dem Flachprofile in den Tank eingebracht werden und an der inneren Tankwandung angeschweißt werden und Bleche in den Tank eingebracht werden und auf die Flachprofile aufgeschweißt werden.The invention relates to a method for producing a double-walled tank from a single-walled tank, in which flat profiles are introduced into the tank and are welded to the inner tank wall and sheets are introduced into the tank and are welded onto the flat profiles.

Ein derartiges Verfahren ist aus der CH-PS 614 417 bekannt. In dieser Patentschrift ist ein Verfahren zur Sanierung eines einwandigen Stahltanks offenbart, bei dem einzelne Bleche durch das Mannloch in den Tank eingeführt werden und dann die einzelnen Bleche zu einem Mantel und zu zwei Böden zusammengefügt werden. Aus Mantel und Böden wird dann ein mit einem Zwischenraum zum bestehenden Stahltank angeordneter, zweiter, flüssigkeitsdichter Tank gebildet, der die zu lagernde Flüssigkeit aufnimmt.Such a method is known from CH-PS 614 417. In this patent, a method for the renovation of a single-walled steel tank is disclosed, in which individual sheets are introduced into the tank through the manhole and then the individual sheets are joined to form a jacket and two bottoms. The jacket and base are then used to form a second, liquid-tight tank with an intermediate space to the existing steel tank, which tank holds the liquid to be stored.

Da die einzelnen Bleche durch das Mannloch in den Tank eingeführt werden, ist die Breite der Bleche sehr gering und es müssen im Tank sehr viele Schweißnähte angebracht werden, um die vielen einzelnen Blechbahnen miteinander zu verschweißen. Außerdem lehrt diese Schweizer Patentschrift die Zargenbleche schuppenförmig aufeinanderzulegen und dann zu verschweißen. Auch dieses Verfahren des Verschweißens der einzelnen Blechstreifen erlaubt nur geringe Blechbreiten, da bei einer Erhöhung der Blechbreite die Bleche sich zwischen den Schweißnähten durch den Innendruck des mit Flüssigkeit gefüllten Tanks nach außen wölben würden und somit in flächige Anlage mit dem zu sanierenden Tank kämen. Bei der Tanksanierung wird jedoch angestrebt, zwischen dem Innentank und dem Außentank einen Zwischenraum zu erhalten, in dem mit einem Leckschutzgerät überprüft werden kann, ob aus dem inneren Tank Flüssigkeit austritt.Since the individual sheets are introduced into the tank through the manhole, the width of the sheets is very small and a large number of welds have to be made in the tank in order to weld the many individual sheet webs together. In addition, this Swiss patent teaches to lay the frame sheets in a scale-like manner on top of one another and then to weld them. This method of welding the individual sheet metal strips also allows only small sheet widths, since if the sheet width were increased, the sheets between the weld seams would bulge outwards due to the internal pressure of the tank filled with liquid and would therefore come into flat contact with the tank to be renovated. When refurbishing tanks, however, the aim is to provide a space between the inner tank and the outer tank in which a leak protection device can be used to check whether liquid is escaping from the inner tank.

Es ist daher Aufgabe der vorliegenden Erfindung ein Verfahren zur Herstellung eines doppelwandigen Tanks aus einem einwandigen Tank vorzustellen, das weniger arbeitsaufwendig und somit schneller durchzuführen ist.It is therefore an object of the present invention to provide a method for producing a double-walled tank from a single-walled tank, which is less labor-intensive and therefore faster to carry out.

Bei dem erfindungsgemäßen Verfahren wird in dem einwandigen Tank ein länglicher Schlitz vorgesehen, durch den zumindest die Bleche in den Tank eingebracht werden, die Flachprofile werden auf mehreren Umfangskreisen des Tanks angeschweißt, die Bleche sind mit Abstandseinrichtungen versehen und werden ohne sich zu berühren nur mit den Flachprofilen verschweißt.In the method according to the invention, an elongated slot is provided in the single-walled tank, through which at least the sheets are introduced into the tank, the flat profiles are welded onto several circumferential circles of the tank, the sheets are provided with spacing devices and are only touched with without touching Welded flat profiles.

Das erfindungsgemäße Verfahren hat den großen Vorteil, daß relativ große Bleche in den Tank eingebracht werden können und dadurch die Zahl der Schweißnähte, die im Tank vorgenommen werden müssen, stark reduziert werden können. Um einen Zwischenraum zwischen dem neu herzustellenden inneren Tank und dem alten Außentank zu erzeugen, werden die Bleche nicht direkt auf den alten Tank aufgeschweißt, sondern sie werden auf Flachprofile aufgeschweißt, die vorher am zu sanierenden Tank angeschweißt worden sind. Das Versehen der Bleche mit Abstandseinrichtungen ermöglicht es, sehr breite Blechbahnen zu verwenden, ohne daß durch den Innendruck des Behälters die Gefahr besteht, daß die Bleche flächig an den Außentank angedrückt werden. Dadurch daß die Bleche nicht wie im Stand der Technik schuppenförmig aufeinander gelegt werden, sondern beabstandet voneinander auf die Flachprofile aufgeschweißt werden, wird weniger Blechmaterial benötigt und es sind auf einer bestimmten Tanklänge wenige Schweißnähte durchzuführen.The process according to the invention has the great advantage that relatively large metal sheets can be introduced into the tank and the number of weld seams that have to be made in the tank can be greatly reduced. In order to create a gap between the new inner tank to be manufactured and the old outer tank, the metal sheets are not welded directly onto the old tank, but rather are welded onto flat profiles that were previously welded to the tank to be renovated. Providing the sheets with spacing devices makes it possible to use very wide sheet webs without the risk of the sheet being pressed against the outer tank by the internal pressure of the container. Because the metal sheets are not placed on top of one another in a scale-like manner as in the prior art, but instead are welded onto the flat profiles at a distance from one another, less sheet metal material is required and fewer weld seams are to be carried out over a certain tank length.

Das erfindungsgemäße Verfahren ermöglicht somit die Verwendung breiterer Blechbahnen und zusätzlich das Verschweißen der Bleche mit einem Abstand zueinander. Dadurch wird die Anzahl der im Tank durchzuführenden Schweißnähte stark reduziert und somit der Arbeitsaufwand zur Sanierung des Tanks erheblich gesenkt.The method according to the invention thus enables the use of wider sheet metal webs and, in addition, the welding of the sheets at a distance from one another. This will increase the number of welds to be made in the tank greatly reduced and thus the work involved in refurbishing the tank is significantly reduced.

Vorteilhaft ist es, die Längsenden der im Tank angeschweißten Flachprofile voneinander beabstandet zu halten und diese Stelle mit einer Abdeckplatte zu überbrücken. Dies hat einerseits den Vorteil, daß die Länge der Flachprofile nicht ganz genau abgemessen werden muß und andererseits hat dies den Vorteil, daß die Kammern, die zwischen den einzelnen Flachprofilringen zwischen Innen- und Außentank entstehen, miteinander durch einen Durchtritt verbunden sind. Somit ist mit Sicherheit gewährleistet, daß zwischen Innentank und Außentank ein durchgehender Raum besteht, der mit einem einzigen Leckschutzgerät überprüft werden kann.It is advantageous to keep the longitudinal ends of the flat profiles welded in the tank spaced apart and to bridge this point with a cover plate. On the one hand, this has the advantage that the length of the flat profiles does not have to be measured exactly, and on the other hand, this has the advantage that the chambers that arise between the individual flat profile rings between the inner and outer tanks are connected to one another by a passage. This ensures with certainty that there is a continuous space between the inner tank and outer tank, which can be checked with a single leak protection device.

Außerdem ist es vorteilhaft, im Zargenbereich und im Bereich der Kalotte als Bleche mit Abstandseinrichtungen sogen. Nockenbleche zu verwenden. Derartige Nockenbleche werden hergestellt, indem ein glattes Blech zwischen einem Unterwerkzeug mit einer Vielzahl an Bohrungen und einem Oberwerkzeug mit einer Vielzahl an Kugeln auf der Werkzeugoberfläche hindurchgeführt wird.It is also advantageous to use so-called plates with spacers in the frame area and in the area of the spherical cap. To use cam plates. Such cam plates are produced by passing a smooth plate between a lower tool with a large number of bores and an upper tool with a large number of balls on the tool surface.

Kugeln und Bohrungen sind in Größe, Form und Anordnung so aufeinander abgestimmt, daß beim Hindurchlaufen des Bleches durch das Werkzeug die Kugeln napfartige Vertiefungen in das Blech prägen. Diese Vertiefungen bilden auf der anderen Seite des Bleches Nocken, die in verschiedene Form und Höhe ausgebildet sein können. Durch die Höhe der Nocken kann ein definierter Abstand zwischen Innentank und Außentank festgelegt werden. Empfehlenswert ist es, die Höhe der Nocken an die Dicke der Flachprofile anzupassen.Balls and holes are coordinated in size, shape and arrangement so that when the sheet passes through the tool, the balls emboss cup-like depressions into the sheet. These depressions form cams on the other side of the sheet, which can be designed in different shapes and heights. The height of the cams allows a defined distance between the inner tank and outer tank to be defined. It is recommended to adjust the height of the cams to the thickness of the flat profiles.

Im Krempenbereich des Klöpperbodens können als Bleche mit Abstandseinrichtungen Riffelbleche verwendet werden. Handelsübliche Riffelbleche sind günstig auf dem Markt zu erhalten und eigenen sich besser als Nockenbleche für eine starke Verformung, die im Krempenbereich notwendig ist. In diesem Fall dienen die regelmäßigen Erhebungen auf der geriffelten Seite des Bleches als Abstandseinrichtungen und verhindern ein flächenartiges Anliegen des Bleches am Außentank.In the brim area of the dished bottom, checker plates can be used as sheets with spacing devices. Commercial checker plates can be obtained cheaply on the market and are more suitable than cam plates for the strong deformation that is necessary in the brim area. In this case, the regular elevations on the corrugated side of the sheet serve as spacing devices and prevent the sheet from lying flat against the outer tank.

Zusätzlich ist es Aufgabe der vorliegenden Erfindung, eine Vorrichtung zum Durchführen des beschriebenen Verfahrens zu schaffen, mit der das erfindungsgemäße Verfahren leicht durchgeführt werden kann.In addition, it is an object of the present invention to provide a device for performing the described method, with which the method according to the invention can be easily carried out.

Diese Vorrichtung weist einen verschiebbaren Wagen auf, an dem mindestens zwei Räder angebracht sind, an deren äußerem Umfang eine in radialer Richtung vergrößerbare Verspanneinrichtung befestigt ist, wobei die Vorrichtung in Einzelteile zerlegbar ist, die durch den Schlitz in den Tank einbringbar sind.This device has a displaceable carriage on which at least two wheels are attached, on the outer circumference of which a fastening device which can be enlarged in the radial direction is fastened, the device being disassembled into individual parts which can be introduced into the tank through the slot.

Die Einzelteile dieser erfindungsgemäßen Vorrichtung können durch das Mannloch oder den Schlitz im zu sanierenden Tank in den Tank eingebracht werden und werden dort zu einem Wagen zusammengesetzt, der längs der Tankachse verschiebbar ist. Außerdem sind die Räder mit der Verspanneinrichtung um die Tankachse drehbar. Diese Vorrichtung ermöglicht es, die großen, schweren Bleche innerhalb des Tanks an die richtige Position zu bringen und dort zu verspannen. Nachdem die Bleche positioniert und verspannt sind, ist es einfach, sie an die Flachprofile festzuschweißen. Die Vorrichtung erlaubt es, jedes Blech einzeln zu verspannen und festzuschweißen. Nachdem der erste Zylinderabschnitt des Innentanks im Tank hergestellt ist, wird die Vorrichtung mittels des Wagens längsverschoben, um mit ihr das nächste Blech zu positionieren, zu verspannen und festzuschweißen.The individual parts of this device according to the invention can be introduced into the tank through the manhole or the slot in the tank to be renovated and are assembled there to form a carriage which can be moved along the tank axis. In addition, the wheels with the tensioning device can be rotated around the tank axis. This device enables the large, heavy sheets to be brought into the correct position within the tank and braced there. After the sheets have been positioned and braced, it is easy to weld them to the flat profiles. The device allows each sheet to be braced and welded individually. After the first cylinder section of the inner tank is made in the tank, the device is moved longitudinally by means of the carriage in order to use it to close the next sheet position, clamp and weld.

Besonders vorteilhaft ist, wenn die in radialer Richtung vergrößerbare Verspanneinrichtung ein aufblasbarer Schlauch ist. Auf die radial äußersten Punkte dieses Schlauches können im unaufgeblasenen Zustand die Blechteile leicht aufgelegt werden und mittels des Wagens innerhalb des Tanks richtig positioniert werden. Danach wird der Schlauch mit Luft aufgeblasen und drückt das Blech gegen die Innenwandung des zu sanierenden Tanks. Dadurch ist das Blech innerhalb des Tanks am richtigen Ort verspannt und kann leicht an den Flachprofilen angeschweißt werden.It is particularly advantageous if the tensioning device, which can be enlarged in the radial direction, is an inflatable tube. In the uninflated state, the sheet metal parts can be easily placed on the radially outermost points of this tube and correctly positioned within the tank by means of the trolley. Then the hose is inflated with air and presses the sheet against the inner wall of the tank to be renovated. As a result, the sheet is clamped in the right place within the tank and can easily be welded to the flat profiles.

An einem Ausführungsbeispiel wird im folgenden die Erfindung unter Bezugnahme auf die Zeichnungen genauer beschrieben.In one embodiment, the invention is described in more detail below with reference to the drawings.

Es zeigen:

Figur 1
eine Draufsicht auf einen Ausschnitt der Innenwandung des Tanks,
Figur 2
einen Schnitt durch den Ausschnitt der Tankwandung längs der Linie II-II in Figur 1,
Figur 3
eine Draufsicht auf den doppelwandigen Tank,
Figur 4
einen Schnitt durch den doppelwandigen Tank längs der Linie IV-IV in Figur 3 und
Figur 5
eine Ansicht der erfindungsgemäßen Vorrichtung innerhalb des Tanks.
Show it:
Figure 1
a plan view of a section of the inner wall of the tank,
Figure 2
2 shows a section through the section of the tank wall along the line II-II in FIG. 1,
Figure 3
a top view of the double-walled tank,
Figure 4
a section through the double-walled tank along the line IV-IV in Figure 3 and
Figure 5
a view of the device according to the invention inside the tank.

In Figur 1 ist die verkleidete Innenseite des fertig verkleideten doppelwandigen Tanks als Ausschnitt zu sehen. Auf den einwandigen Tank, der in Figur 1 nicht zu sehen ist, ist ein Flachprofil 2 aufgeschweißt, das mit gestrichelten Linien dargestellt ist. Dieses Flachprofil 2 verläuft auf einem Umfangskreis des Tanks und hat somit zwei Enden 3 und 4, die an einer Stelle aufeinander zu laufen. Die Länge der Flachprofile ist so bemessen, daß sich die Enden 3 und 4 der Flachprofile nicht berühren. Auf die Flachprofile sind Nockenbleche 5 und 6 so aufgeschweißt, daß die Nockenbleche 5 und 6 zwar jeweils das Flachprofile berühren aber nicht aufeinanderstoßen. Die Nockenbleche 5 und 6 haben gleichmäßig verteilte Nocken, die sich über das gesamte Nockenblech verteilen. An der Stelle, an der die Enden 3 und 4 des Flachprofils 2 aufeinander zulaufen und der Übergang von den Nockenblechen abgedeckt wird, entsteht ein Durchbruch 7 zwischen zwei Zwischenräumen, die einerseits zwischen Tank und Nockenblech 5 und andererseits zwischen Tank und Nockenblech 6 entstehen. Dieser Durchbruch 7 wird von einer Platte 8 abgedeckt, die im wesentlichen rechteckig ist und in ihrer Längserstreckung mit einer Vertiefung versehen ist, die besser in Figur 2 zu sehen ist. Diese Abdeckplatte 8 ist so auf die Nockenbleche 5 und 6 geschweißt, daß sie mit ihren seitlichen Rändern einerseits auf dem Nockenblech 5 und andererseits auf dem Nockenblech 6 aufliegt und im Bereich der Vertiefung mit den beiden Enden 3 und 4 des Flachprofils 2 verschweißt ist. Da die Abdeckplatte 8 jedoch die Tankwandung nicht berührt, entsteht zwischen der Tankwandung und der Abdeckplatte zwischen den Enden 3 und 4 des Flachprofils 2 ein Durchbruch.In Figure 1, the lined inside of the finished lined double-walled tank can be seen as a cutout. A flat profile 2 is welded onto the single-walled tank, which cannot be seen in FIG. 1, and is shown with dashed lines. This flat profile 2 runs on a circumferential circle of the tank and thus has two ends 3 and 4 which run at one point on each other. The length of the flat profiles is dimensioned so that the ends 3 and 4 of the flat profiles do not touch. Cam plates 5 and 6 are welded onto the flat profiles in such a way that the cam plates 5 and 6 each touch the flat profile but do not collide. The cam plates 5 and 6 have evenly distributed cams which are distributed over the entire cam plate. At the point at which the ends 3 and 4 of the flat profile 2 converge and the transition is covered by the cam plates, there is a breakthrough 7 between two gaps that arise on the one hand between the tank and the cam plate 5 and on the other hand between the tank and the cam plate 6. This opening 7 is covered by a plate 8, which is essentially rectangular and is provided in its longitudinal extent with a depression, which can be seen better in FIG. This cover plate 8 is welded to the cam plates 5 and 6 so that it rests with its lateral edges on the one hand on the cam plate 5 and on the other hand on the cam plate 6 and is welded to the two ends 3 and 4 of the flat profile 2 in the region of the depression. However, since the cover plate 8 does not touch the tank wall, a breakthrough occurs between the tank wall and the cover plate between the ends 3 and 4 of the flat profile 2.

In Figur 2 ist der Aufbau des doppelwandigen Tanks genauer zu erkennen. An der Innenseite des zu sanierenden Tanks 1 ist das Flachprofil 2 aufgeschweißt, auf das wiederum die Nockenbleche 5 und 6 aufgeschweißt sind. Darüber ist die Abdeckplatte 8 zu sehen, die aber nur im Bereich des Durchgangs 7 benötigt wird. Vorteilhafterweise ist die Dicke des Flachprofils so stark wie die Höhe der Nocken in den Blechen 5 und 6. Dadurch wird erreicht, daß die Nockenbleche parallel zur Innenwandung des Tanks 1 verlaufen.The structure of the double-walled tank can be seen more clearly in FIG. On the inside of the tank 1 to be renovated, the flat profile 2 is welded, on which in turn the cam plates 5 and 6 are welded. The cover plate 8 can be seen above this, but is only required in the area of the passage 7. Advantageously, the thickness of the flat profile is as thick as the height of the cams in the plates 5 and 6. This ensures that the cam plates run parallel to the inner wall of the tank 1.

In Figur 3 ist der Tanks 1 gezeigt, in dem eine rechteckige Öffnung 9 vorgesehen ist, um die Flachprofile und die Nockenbleche in den Tank einzubringen. Die relativ große Längserstreckung der rechteckigen Öffnung 9 erlaubt es, breite Nockenbelche in den Tank einzuführen, die durch das Mannloch in den Tank nicht einzuführen wären.FIG. 3 shows the tank 1, in which a rectangular opening 9 is provided in order to introduce the flat profiles and the cam plates into the tank. The relatively large longitudinal extent of the rectangular opening 9 allows wide cam plates to be introduced into the tank which would not have to be introduced into the tank through the manhole.

In Figur 4 ist die Ausgestaltung eines Tankbodens dargestellt. Die Kalotte wird von zwei halbkreisförmigen Nockenblechen 10 und 11 gebildet, die so groß gewählt sind, daß sie leicht durch die Öffnung 9 in den Behälter einzubringen sind. Größere Kalotten können auch aus mehr als zwei Blechsegmenten zusammengesetzt werden. Im Krempenbereich besteht der Klöpperboden aus mehreren Riffelblechsegmenten 12, deren geriffelte Blechseite zur Tankwandung hin zeigt, um das Blech im Abstand von der Tankwandung zu halten. Da Riffelbleche einfacher zu verformen sind, ohne daß die Abstandseinrichtungen zerstört werden, werden im Krempenbereich Riffelbleche den sonst verwendeten Nockenblechen vorgezogen.FIG. 4 shows the design of a tank bottom. The dome is formed by two semicircular cam plates 10 and 11, which are chosen so large that they are easy to insert through the opening 9 in the container. Larger domes can also be assembled from more than two sheet segments. In the brim area, the dished bottom consists of several corrugated sheet segments 12, the corrugated sheet side of which points towards the tank wall in order to keep the sheet at a distance from the tank wall. Since checker plates are easier to deform without destroying the spacing devices, checker plates are preferred to the otherwise used cam plates in the brim area.

Die in Figur 5 gezeigte Vorrichtung 20 zur Durchführung des erfindungsgemäßen Verfahrens besteht aus einem verschiebbaren Wagen 21, der auf vier Rädern (gezeigt sind nur die Räder 22, 23) in Richtung der Längsachse des Tanks verschiebbar ist. Über ein Gestell 24 tragen die Räder 22, 23 eine Achse 25. Das Gestell ist so einstellbar, daß die Achse 25 mit der Längsachse des Tanks konzentrisch ist. Auf dieser Achse 25 sind zwei Räder 26, 27 befestigt deren radiale Umfangsflächen 28 und 29 in der Nähe der Tankwandung verlaufen. Auf den radialen Umfangsflächen 28 und 29 ist jeweils ein Schlauch 30, 31 befestigt, der zwischen der Innenwand des Tanks 1 und den Umfangsflächen 28, 29 der Räder 26, 27 liegt.The device 20 shown in FIG. 5 for carrying out the method according to the invention consists of a displaceable carriage 21 which can be displaced on four wheels (only the wheels 22, 23 are shown) in the direction of the longitudinal axis of the tank. The wheels 22, 23 carry an axle 25 via a frame 24. The frame is like this adjustable so that the axis 25 is concentric with the longitudinal axis of the tank. On this axis 25 two wheels 26, 27 are fastened whose radial peripheral surfaces 28 and 29 run in the vicinity of the tank wall. On the radial peripheral surfaces 28 and 29, a hose 30, 31 is fastened, which lies between the inner wall of the tank 1 and the peripheral surfaces 28, 29 of the wheels 26, 27.

Bei der Durchführung des erfindungsgemäßen Verfahrens werden zuerst Flachprofile 2 durch die Öffnung 9 in den zu sanierenden Tank 1 eingebracht und auf beabstandeten Umfangskreisen an die Innenwandung des Tanks 1 angeschweißt. Dann wird die Vorrichtung zum Durchführen des Verfahrens in ihre Einzelteile zerlegt, so daß sie leicht durch die Öffnung 9 in den Tank zu bringen ist. Danach wird die Vorrichtung zusammengebaut und unter der Öffnung 9 im Tank aufgestellt. Die Schläuche 30 und 31 sind in diesem Verfahrensstadium noch drucklos. Über die um die Achse 25 drehbaren Räder 26 und 27 können die relativ großen Nockenbleche durch die Öffnung 9 sachte in den Tank 1 eingebracht werden. Genauer gesagt werden mit der Vorrichtung die Nockenbleche 5 der oberen und der unteren Mantelschale (32,33) in Achsrichtung an Ort und Stelle gebracht und nach oben gedreht. So wird beispielsweise das erste Nockenblech 5 durch die Öffnung 9 in den Tank eingeführt und kommt auf den drucklosen Schläuchen der Vorrichtung 20 zu liegen. Mittels der Vorrichtung 20 kann dieses Nockenblech 5 innerhalb des Tanks 1 so verschoben werden, daß die Seitenkanten 5a und 5b des Nockenbleches 5 auf den beabstandeten Flachprofilen 2 zu liegen kommen. Anschließend werden die Schläuche 30 und 31 mit Luft so weit aufgeblasen, daß das Nockenblech 5 fest an die Flachprofile 2 angepreßt wird. In diesem Verfahrensschritt ist es leicht, das Nockenblech 5 an die Flacheisen 2 anzuschweißen. Danach wird ein weiteres Nockenblech 6 auf die gleiche Weise in den Tank 1 eingeführt und neben dem ersten Nockenblech 5 mit einem geringen Abstand zum ersten Nockenblech 5 an das Flachprofil 2 angedrückt und anschließend verschweißt. In einem abschließenden Arbeitsgang werden Platten 8 auf die Durchlaßstellen 7 aufgebracht und verschweißt, so daß das im Tank 1 befindliche Produkt nur mit den neuen in den Tank 1 eingebrachten Blechen und Profilen in Verbindung kommt. Die Bodenteile 10,11,12 des Innentanks werden ebenso als Einzelteile in den Tank 1 eingebracht und auf herkömmliche Weise miteinander und mit den Zargenteilen verschweißt. Abschließend kann der Hohlraum zwischen dem mit dem erfindungsgemäßen Verfahren hergestellten inneren Tank und dem zu sanierenden äußeren Tank 1 mit einem Leckschutzgerät versehen werden, das jegliche Undichtigkeit im doppelwandigen Tank feststellen und melden kann.When carrying out the method according to the invention, flat profiles 2 are first introduced through the opening 9 into the tank 1 to be renovated and welded onto the inner wall of the tank 1 on spaced circumferential circles. Then the device for carrying out the method is disassembled into its individual parts so that it can be easily brought into the tank through the opening 9. The device is then assembled and placed under the opening 9 in the tank. The hoses 30 and 31 are still depressurized at this stage of the process. The relatively large cam plates can be inserted gently into the tank 1 through the opening 9 via the wheels 26 and 27 which can be rotated about the axis 25. More precisely, the device brings the cam plates 5 of the upper and lower jacket shells (32, 33) in place in the axial direction and rotates them upwards. For example, the first cam plate 5 is inserted into the tank through the opening 9 and comes to rest on the unpressurized hoses of the device 20. By means of the device 20, this cam plate 5 can be displaced within the tank 1 in such a way that the side edges 5a and 5b of the cam plate 5 come to rest on the spaced flat profiles 2. The hoses 30 and 31 are then inflated with air to such an extent that the cam plate 5 is pressed firmly against the flat profiles 2. In this process step, it is easy to weld the cam plate 5 to the flat iron 2. A further cam plate 6 is then introduced into the tank 1 in the same way and, in addition to the first cam plate 5, is pressed onto the flat profile 2 at a short distance from the first cam plate 5 and then welded. In a final operation, plates 8 are applied to the passage points 7 and welded, so that the product in the tank 1 only comes into contact with the new sheets and profiles introduced into the tank 1. The bottom parts 10, 11, 12 of the inner tank are likewise introduced into the tank 1 as individual parts and welded to one another and to the frame parts in a conventional manner. Finally, the cavity between the inner tank produced by the method according to the invention and the outer tank 1 to be refurbished can be provided with a leak protection device which can detect and report any leaks in the double-walled tank.

Claims (6)

Verfahren zur Herstellung eines doppelwandigen Tanks aus einem einwandigen Tank (1), bei dem Flachprofil (2) in den Tank eingebracht werden und an der inneren Tankwandung festgeschweißt werden und Bleche (5,6) in den Tank eingebracht werden und auf die Flachprofile (2) aufgeschweißt werden, dadurch gekennzeichnet, daß in dem einwandigen Tank (1) ein länglicher Schlitz (9) vorgesehen wird, durch den zumindest die Bleche in den Tank (1) eingebracht werden, die Flachprofile (2) auf mehreren Umfangskreisen des Tanks (1) angeschweißt werden, die Bleche (5,6) mit Abstandseinrichtungen versehen sind und ohne sich zu berühren nur mit den Flachprofilen (2) verschweißt werden.Method for producing a double-walled tank from a single-walled tank (1), in which the flat profile (2) is introduced into the tank and welded to the inner tank wall, and sheets (5,6) are introduced into the tank and onto the flat profiles (2 ) are welded on, characterized in that an elongated slot (9) is provided in the single-walled tank (1), through which at least the metal sheets are introduced into the tank (1), the flat profiles (2) on several circumferential circles of the tank (1 ) are welded on, the sheets (5,6) are provided with spacing devices and are only welded to the flat profiles (2) without touching each other. Verfahren nach Anspruch 1, dadurch gekennzeichnet, daß die Längsenden (3,4) der im Tank angeschweißten Flachprofile (2) voneinander beabstandet sind und mit einer Abdeckplatte (8) überbrückt werden.Method according to claim 1, characterized in that the longitudinal ends (3, 4) of the flat profiles (2) welded in the tank are spaced apart and are bridged with a cover plate (8). Verfahren nach einem der vorhergehenden Ansprüche dadurch gekennzeichnet, daß im Zargenbereich und im Bereich der Kalotte als Blech mit Abstandseinrichtungen Nockenbleche (5,6) verwendet werden.Method according to one of the preceding claims, characterized in that cam plates (5, 6) are used as sheet metal with spacing devices in the area of the frame and in the area of the spherical cap. Verfahren nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß im Krempenbereich des Klöpperbodens als Bleche mit Abstandseinrichtungen Riffelbleche verwendet werden.Method according to one of the preceding claims, characterized in that in the brim area of the dished bottom, checker plates are used as sheets with spacing devices. Vorrichtung zur Durchführung des Verfahrens nach einem der vorhergehenden Ansprüche mit einem verschiebbaren Wagen (21), an dem mindestens zwei Räder (26,27) angebracht sind, an deren äußerem Umfang eine in radialer Richtung vergrößerbare Verspanneinrichtung (30,31) befestigt ist, wobei die Vorrichtung in Einzelteile zerlegbar ist, die durch den Schlitz in den Tank einbringbar sind.Device for carrying out the method according to one of the preceding claims, with a displaceable carriage (21) on which at least two wheels (26, 27) are attached, on the outer circumference of which a fastening device (30, 31) which can be enlarged in the radial direction is fastened, wherein the device can be dismantled into individual parts which can be introduced into the tank through the slot. Vorrichtung nach Anspruch 5, dadurch gekennzeichnet, daß die in radialer Richtung vergrößerbare Verspanneinrichtung (30,31) ein aufblasbarer Schlauch ist.Device according to claim 5, characterized in that the tensioning device (30, 31), which can be enlarged in the radial direction, is an inflatable tube.
EP95115142A 1994-10-04 1995-09-26 Method of and device for producing a double-walled tank Expired - Lifetime EP0705771B1 (en)

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DE4435237A DE4435237C1 (en) 1994-10-04 1994-10-04 Method and device for producing a double-walled tank
DE4435237 1994-10-04

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EP0705771B1 EP0705771B1 (en) 1997-06-11

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
WO2001028893A1 (en) 1999-10-20 2001-04-26 Utek Umweltschutztechnologien Gmbh Leak-resistant lining for tanks and a method for equipping tanks therewith
DE10223930C1 (en) * 2002-05-10 2003-11-06 Mueller Patent Entwicklungs Un Leakage protection, at a tank or container, has spaced wall support profile carriers with clamping bolts acting on pressure plates to hold the sealing film, to take up the effects of thermal expansion/contraction

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE29807285U1 (en) 1998-04-22 1998-07-30 Utek Umweltschutztechnologien GmbH, 06785 Oranienbaum Flat bottom tank with leak protection lining
DE10049640A1 (en) 2000-10-05 2002-04-11 Huels Troisdorf Liquid containers and means and methods for lining the same
CN104275565B (en) * 2014-08-13 2016-06-15 浙江海洋学院 Oil tank strengthening core solder loading machine

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Publication number Priority date Publication date Assignee Title
CH614417A5 (en) 1977-03-23 1979-11-30 Neo Vac Und Tank Service Ag Method for producing a leak-proofing lining on an existing, single-walled steel tank, and tank produced according to the method

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH614417A5 (en) 1977-03-23 1979-11-30 Neo Vac Und Tank Service Ag Method for producing a leak-proofing lining on an existing, single-walled steel tank, and tank produced according to the method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2001028893A1 (en) 1999-10-20 2001-04-26 Utek Umweltschutztechnologien Gmbh Leak-resistant lining for tanks and a method for equipping tanks therewith
DE19950466A1 (en) * 1999-10-20 2001-05-10 Utek Umweltschutztechnologien Leak protection lining for tanks and method for equipping tanks with a leak protection lining
DE19950466C2 (en) * 1999-10-20 2001-08-16 Utek Umweltschutztechnologien Leak protection lining for tanks and method for equipping tanks with a leak protection lining
DE10223930C1 (en) * 2002-05-10 2003-11-06 Mueller Patent Entwicklungs Un Leakage protection, at a tank or container, has spaced wall support profile carriers with clamping bolts acting on pressure plates to hold the sealing film, to take up the effects of thermal expansion/contraction

Also Published As

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DE4435237C1 (en) 1996-02-22
EP0705771B1 (en) 1997-06-11
ATE154324T1 (en) 1997-06-15

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