EP3024620B1 - Compressed-air blasting device for blasting the interior of pipe segments and tower segments - Google Patents

Compressed-air blasting device for blasting the interior of pipe segments and tower segments Download PDF

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Publication number
EP3024620B1
EP3024620B1 EP14755328.3A EP14755328A EP3024620B1 EP 3024620 B1 EP3024620 B1 EP 3024620B1 EP 14755328 A EP14755328 A EP 14755328A EP 3024620 B1 EP3024620 B1 EP 3024620B1
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EP
European Patent Office
Prior art keywords
compressed
unit
nozzle
blasting
work piece
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Not-in-force
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EP14755328.3A
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German (de)
French (fr)
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EP3024620A1 (en
Inventor
Heribert Heinen
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Wheelabrator Group GmbH
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Wheelabrator Group GmbH
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24C—ABRASIVE OR RELATED BLASTING WITH PARTICULATE MATERIAL
    • B24C3/00—Abrasive blasting machines or devices; Plants
    • B24C3/32—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks
    • B24C3/325—Abrasive blasting machines or devices; Plants designed for abrasive blasting of particular work, e.g. the internal surfaces of cylinder blocks for internal surfaces, e.g. of tubes

Definitions

  • the invention relates to a compressed air jet device for the internal radiation of pipe sections and tower segments (see, for example FR 2 450 668 A1 ).
  • Air jet devices emit a granular abrasive such as blast furnace slag.
  • the blasting medium is directed onto the workpiece surface to be treated at high speed. Due to the impulse upon impact, adhering scale and rust layers are loosened. Also, depending on the grain size of the abrasive used, a desired roughness of the workpiece surface is adjusted to prepare for subsequent processing steps, such as coating with metallic coatings or coatings and polymeric coatings, and to achieve good adhesion of the coatings and coatings.
  • Object of the present invention is to provide a compressed air jet device for internal radiation of pipe sections and tower segments, with an effective surface treatment of the inner walls of pipe sections and tower segments in less time is possible than in purely manually performed with compressed air jet surface treatments.
  • This device consists essentially of a stationary support unit, which is arranged stationary and outside of the space provided for the storage of the workpiece storage space. For example, if the workpiece is positioned in a hall, it is possible to position the support unit outside of it.
  • Another essential assembly is a track, which is initially coupled to an axial guide device of the support device, inserted by this in the open tower segment and then deposited on the inner wall of the workpiece.
  • the actual blast treatment is performed by a nozzle carrier unit, which is connected to the moving unit.
  • the nozzle carrier unit has at least one compressed-air jet nozzle, which is connected to a blasting medium feed line.
  • the support unit in conjunction with the Axial Operations planned at a time prior to the start of the surface treatment also includes the track and the attached thereto nozzle carrier unit.
  • a height adjustment device on the support unit makes it possible to first raise the track to the intended height at which it is possible to insert the track into the workpiece that is open at the end. If the height is aligned accordingly, the track unit can be moved toward the workpiece relative to the support unit by means of the axial guide device. The moving unit is thereby pushed into the interior of the end region of the workpiece, wherein the moving unit together with the nozzle carrier unit is still supported by the support unit.
  • the positioning unit is then lowered onto the rounded workpiece surface by lowering it by means of the height adjustment device on the support unit or by extending its own, length-adjustable wheel carrier elements with its wheels. Once the track is placed with its wheels or rollers on the workpiece surface, the connection to the Axial Operationss worn can be solved.
  • the positioning unit is then mechanically no longer coupled to the axial guidance device and the support unit, but can be moved automatically within the workpiece. There is only one connection to a Strahlatorizutaxtechnisch and with a power line, which are designed to be flexible.
  • the blasting agent supply line and / or the power line can be rolled up and unwound on large reels, which are rotatably mounted on the support unit.
  • the nozzle carrier unit can be activated.
  • it is provided in particular to provide length-adjustable guide elements for the blasting agent nozzles in order to set a suitable distance between the blasting medium nozzles and the workpiece surface, in particular from 400 mm to 500 mm.
  • the track unit adjustable wheel carrier elements a continuous height adjustment along the working and travel path is provided such that a uniform movement along the central axis of the pipe section or tower segment is possible.
  • the blasting operation After aligning the jet nozzle with respect to the inner wall of the workpiece, the blasting operation can be recorded. It is the blasting agent fed through the Strahlstoffzuextechnisch and bombarded the workpiece surface.
  • the compressed air jet nozzle may be provided to store the compressed air jet nozzle on rotatable nozzle holder elements, which are then alternately moved by a certain pivot angle, so as to cover larger surface areas.
  • a certain pivot angle For example, if two jet nozzles are provided on diametrically opposite sides, a pivoting of about 190 ° is provided to ensure a complete treatment of the workpiece surface.
  • three jet nozzles are provided, which are arranged at an angle of 120 ° to each other. These jet nozzles are each mounted individually on length-adjustable holder elements in the radial direction.
  • the holding elements in turn are connected to each other and rotatable as a unit by a certain pivot angle, which is in the case of an arrangement of three compressed air jet nozzles at about 130 °. This is slightly more than a calculated third of the total circumference, so that overlaps ensure that all surface areas are irradiated.
  • the surface treatment is then carried out in such a way that under continuous oscillating reciprocating motion of the carrier unit for the compressed air jet blasting is directed to the workpiece surface and at the same time a displacement along the central axis of the workpiece by independent movement of the track is carried out so that a continuous surface treatment up to the end area of the workpiece is possible.
  • the moving unit can be provided in the moving unit to provide two pairs of wheels at a distance in the longitudinal direction to each other, wherein these wheels are each aligned radially with respect to the central axis of the workpiece or perpendicular to the workpiece surface.
  • two wheels may be provided in each pair of wheels, which are seen in cross-section at an angle of 120 ° aligned with each other.
  • each nozzle carrier holding element is adjustable in length.
  • articulated arrangements in the manner of a aufspannbaren screen, where displaced by displacement of a central spoke support member articulated arms more or less. With this adjustment, the distance of the nozzle to the wall can be adjusted continuously, especially in conical workpieces.
  • This umbrella principle can be applied not only to the diameter adjustment of the nozzle carrier unit for the chassis of the track. In each case, only one linear-acting actuator is required in order to be able to simultaneously effect a uniform radial adjustment of a plurality of nozzles or wheels or wheelsets.
  • the wheels of the track are designed in particular as low-pressure tires, which allow good adhesion to the inner wall of the workpiece and an adaptation to the respective geometry with a large contact surface.
  • the moving unit together with the nozzle carrier unit is moved back into an end-side position at which a renewed coupling takes place to the axial guiding device of the support unit.
  • the coupling can for example take place in such a way that the axial guide device has one or more extendable carriers, which are pushed under the center of mass of the moving part.
  • the positioning unit By pulling up the wheel units, the positioning unit then lowers onto the carriers of the axial guidance device.
  • centering aids can be provided in order to achieve an exact positioning and to prevent slippage of the moving part during the subsequent retraction of the moving part out of the workpiece.
  • the traversing device in addition to the blasting agent supply line also has a suction line to continuously suck on the bottom collecting blasting agent and thus to avoid a subsequent cleaning process or at least significantly shorten.
  • an additional blow-off device may be provided which is in particular connected or coupled to the nozzle carrier unit. From this compressed air is deliberately added to the workpiece surface in order to keep the surface areas to be treated free of blasting agent.
  • the Axial arrangements beautiful can be formed for example by a carriage, which is guided with its rollers in profile carriers.
  • the profiles are I or U profiles with upper and lower belt, so that tilting in the direction of travel is prevented.
  • Fig. 1 shows a compressed air jet device 100.
  • a rail-shaped base frame 11 of a support unit 10 is arranged on a foundation 1.
  • the moving unit 20 is displaceably mounted with a nozzle unit 30.
  • the moving unit 20 rests on the upper side of the carriage 12 at corresponding centering devices.
  • a reel 14 for a blasting agent supply line is also arranged stationary.
  • the carriage 12 with the nozzle unit 30 is already pushed into the interior of a conically tapered tower segment 2.
  • a separation of the installation of the support unit 10 is indicated by the storage space for the workpiece 2; this may be, for example, a door opening of a production hall.
  • the moving unit 20 is mounted on the carriage 12 in FIG FIG. 1 shown twice, namely left outside of the workpiece and right inside the workpiece. 2
  • Base frame 11, carriage 12 and a coupling rod 13 are part of an axial guide device.
  • the axial guidance device is required only over a short path, namely in order to be able to completely bring the traversing unit 20 into the end-side region of the workpiece 2 or back out of it.
  • a height adjustment device 15 in the form of spindles is realized, by means of which the guide rail 11, which carries the carriage 12 of the axial guide device, can be adjusted in height.
  • FIG. 2 is the center of the wheel assembly of the track 20 already positioned on the central axis 4 of the workpiece 2 by the height adjustment device 15, the guide rail 11 and the carriage 12 has raised.
  • FIG. 2 As an alternative to the wheel adjusting device in the moving part 20 in FIG Fig. 2 , which works in the manner of a umbrella frame, is in a track 20 'in Fig. 3 provided, at opposite ends of a support arm 22 'respectively rollers 21' to be arranged.
  • the support arms 22 ' are interconnected crosswise at a node 23'.
  • the adjusting elements 24 ' By means of the adjusting elements 24 ', the two support arms 22' spread apart from each other be, whereby the distance of the lower and upper wheels 21 'to each other changes and the height of the node 23', which forms the center, relative to the workpiece 2 can be adjusted accordingly.
  • the center of the nozzle carrier unit can be raised to the central axis of the workpiece 2.
  • Fig. 4 Parts of the axial guide device in the support unit 10 are in Fig. 4 shown.
  • the carriage 12 is mounted on roller pairs, which point with their rollers 16 respectively outwardly in profile carriers 11, whose open profile pages are aligned facing each other.
  • the rollers 16 can thus be supported both on the lower flange and on the upper flange of the profile support 11 and are also secured against lateral displacement.
  • Fig. 5 shows a possible embodiment of a nozzle unit 30.
  • Several compressed air jet nozzles 31 are arranged on a screen-like construction and have with their nozzle orifices radially outward. About the umbrella-shaped construction, an adaptation of the radial distance to the inner wall of the workpiece 2 is possible.
  • the compressed air jet nozzles 31 are attached to retaining arms 32 which are hingedly connected to a joint head 33. About a displacement of a node 35, are connected to the spokes elements 34 hinged, which support the support arms 32, the radial distance of the compressed air jet nozzles 31 can be changed from the wall of the workpiece 2.
  • the compressed air jet nozzles 31 are connected to movable jet tubes 37, which easily follow the adjustment of the diameter in the nozzle unit 30.
  • the positioning of the central axis of the arrangement of the abrasive nozzles 31 in the nozzle unit 30 is possible by the previously described adjustment possibilities of the moving unit 20 in order to position the nozzle unit 30 on the central axis 4 of the workpiece 2.
  • a blow-off device 36 may be provided in order to keep the area of action of the compressed-air jet nozzles 31 free, especially in the bottom area where the blasting agent collects.

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  • Mechanical Engineering (AREA)
  • Cleaning In General (AREA)
  • Spray Control Apparatus (AREA)

Description

Die Erfindung betrifft eine Druckluftstrahlvorrichtung für das Innenstrahlen von Rohrabschnitten und Turmsegmenten, (siehe z.B. FR 2 450 668 A1 ).The invention relates to a compressed air jet device for the internal radiation of pipe sections and tower segments (see, for example FR 2 450 668 A1 ).

Druckluftstrahlvorrichtungen emittieren ein körniges Strahlmittel, wie beispielsweise Hochofenschlacke. Das Strahlmittel wird mit großer Geschwindigkeit auf die zu behandelnde Werkstückoberfläche gerichtet. Durch den Impuls beim Auftreffen werden anhaftende Zunder- und Rostschichten gelöst. Auch wird je nach Korngröße des verwendeten Strahlmittels eine gewünschte Rauigkeit der Werkstückoberfläche eingestellt, um diese für nachfolgende Behandlungsschritte, wie das Überziehen mit metallischen Überzügen oder mit Lacken und polymeren Beschichtungen, vorzubereiten und eine gute Haftung der Überzüge und Beschichtungen zu erreichen.Air jet devices emit a granular abrasive such as blast furnace slag. The blasting medium is directed onto the workpiece surface to be treated at high speed. Due to the impulse upon impact, adhering scale and rust layers are loosened. Also, depending on the grain size of the abrasive used, a desired roughness of the workpiece surface is adjusted to prepare for subsequent processing steps, such as coating with metallic coatings or coatings and polymeric coatings, and to achieve good adhesion of the coatings and coatings.

Große Werkstückoberflächen werden dabei meist mit Schleuderradturbinen beaufschlagt, durch welche große Mengen von Strahlmittel pro Zeiteinheit aufzubringen sind und somit großflächige Behandlungen in kurzer Zeit möglich sind. Auch wenn offene rohrförmige Werkstücke endseitig gut zugänglich sind, so ist eine Behandlung von Innenflächen mit Schleuderrädern meist nicht möglich, weil diese an lanzenförmigen Halterungen bis tief in das Werkstück eingeführt werden müssen, wobei neben den hohen Haltekräften für die schweren Schleuderradturbinen auch die Versorgung mit Strahlmittel problematisch ist. Weiterhin ist die Abfuhr des Strahlmittels aus dem Inneren des Werkstücks problematisch. Die erheblichen Mengen von Strahlmitteln, die mit Schleuderrädern verarbeitet werden, können nur schwer aus dem Inneren der Werkstücke heraustransportiert werden und müssen meist sogar manuell beseitigt werden.Large workpiece surfaces are usually applied with centrifugal turbines, through which large amounts of blasting agent per unit time are applied and thus large-scale treatments in a short time are possible. Even if open tubular workpieces are easily accessible at the ends, a treatment of inner surfaces with blast wheels is usually not possible, because they have to be introduced to lancet holders to deep into the workpiece, in addition to the high holding forces for the heavy centrifugal turbines and the supply of blasting is problematic. Furthermore, the removal of the blasting agent from the interior of the workpiece is problematic. The considerable amounts of blasting agents that are processed with blasting wheels, can be difficult to be transported out of the interior of the workpieces and usually even have to be eliminated manually.

Innerhalb von Hohlräumen ist daher in den meisten Fällen eine manuelle oder robotergestützte Oberflächenbehandlung über Druckluftstrahldüsen erforderlich. Hierbei wird in der Druckluftstrahldüse das Strahlmittel in einem Luftstrom mitgerissen und prallt ebenfalls mit hoher Geschwindigkeit auf die Werkstückoberfläche. Im Vergleich zum Einsatz von Schleuderrädern können jedoch pro Zeiteinheit nur kleinere Flächen nachbehandelt werden. Bei großen, innen liegenden Oberflächen, wie sie beispielsweise innerhalb von Rohrabschnitten vorliegen, ist die Behandlung der Oberfläche entsprechend zeitintensiv.Within cavities, manual or robot-assisted surface treatment via compressed air jet nozzles is therefore required in most cases. In this case, the blasting agent is entrained in an air flow in the compressed air jet and also bounces at high speed on the workpiece surface. In comparison to the use of blast wheels, however, only smaller surfaces can be aftertreated per unit time. For large, internal surfaces, such as those found within pipe sections, the treatment of the surface is correspondingly time-consuming.

Bei langen Rohrabschnitten wie auch bei Turmsegmenten, aus denen Türme für Windkraftanlagen errichtet werden, kommt also der Einsatz von Schleuderrädern zur großflächigen Oberflächenbehandlung nicht infrage. Zugleich wird beispielsweise für die manuelle Behandlung eines Turmsegments mit einer Länge von etwa 30 m mit Druckluftstrahldüsen eine ganze Tagesschicht benötigt.For long pipe sections as well as tower segments from which towers for wind turbines are built, so the use of centrifugal wheels for large surface treatment is out of the question. At the same time, for example, for the manual treatment of a tower segment with a length of about 30 m with compressed air jet nozzles a whole day shift is needed.

Aufgabe der vorliegenden Erfindung ist es, eine Druckluftstrahlvorrichtung für das Innenstrahlen von Rohrabschnitten und Turmsegmenten anzugeben, mit der eine effektive Oberflächenbehandlung der Innenwandungen von Rohrabschnitten und Turmsegmenten in kürzerer Zeit möglich ist als bei rein manuell mit Druckluftstrahldüsen durchgeführten Oberflächenbehandlungen.Object of the present invention is to provide a compressed air jet device for internal radiation of pipe sections and tower segments, with an effective surface treatment of the inner walls of pipe sections and tower segments in less time is possible than in purely manually performed with compressed air jet surface treatments.

Erfindungsgemäß wird diese Aufgabe durch eine Druckluftstrahlvorrichtung mit den Merkmalen des Anspruchs 1 gelöst.According to the invention this object is achieved by a compressed air jet device with the features of claim 1.

Diese Vorrichtung besteht im Wesentlichen aus einer ortsfesten Supporteinheit, welche ortsfest und außerhalb des für die Lagerung des Werkstücks vorgesehenen Lagerplatzes angeordnet ist. Ist beispielsweise das Werkstück in einer Halle positioniert, so ist es möglich, die Supporteinheit außerhalb davon zu positionieren.This device consists essentially of a stationary support unit, which is arranged stationary and outside of the space provided for the storage of the workpiece storage space. For example, if the workpiece is positioned in a hall, it is possible to position the support unit outside of it.

Eine weitere wesentliche Baugruppe ist eine Verfahreinheit, die zunächst mit einer Axialführungseinrichtung der Supporteinrichtung gekoppelt ist, von dieser in das offene Turmsegment eingeschoben und dann auf die Innenwandung des Werkstücks abgesetzt wird.Another essential assembly is a track, which is initially coupled to an axial guide device of the support device, inserted by this in the open tower segment and then deposited on the inner wall of the workpiece.

Die eigentliche Strahlbehandlung wird durch eine Düsenträgereinheit vorgenommen, die mit der Verfahreinheit verbunden ist. Die Düsenträgereinheit weist wenigstens eine Druckluftstrahldüse auf, die an eine Strahlmittelzuführleitung angeschlossen ist.The actual blast treatment is performed by a nozzle carrier unit, which is connected to the moving unit. The nozzle carrier unit has at least one compressed-air jet nozzle, which is connected to a blasting medium feed line.

Hierdurch ergibt sich erfindungsgemäß auch eine Verfahrensweise zum Innenstrahlen von Rohrabschnitten und Turmsegmenten mit den Merkmalen des Anspruchs 9.In accordance with the invention, this also results in a procedure for internal blasting of pipe sections and tower segments having the features of claim 9.

Aufbau und Betrieb einer erfindungsgemäßen Druckluftstrahlvorrichtung werden nachfolgend näher erläutert:

  • Ein Werkstück, wie insbesondere ein Turmsegment einer Windenergieanlage mit einem Konuswinkel von beispielsweise 1° bis 5°, wird fest auf dem vorgesehenen Lagerplatz positioniert, und zwar so, dass die Längsachse des Werkstücks im Wesentlichen parallel zur Längsachse der Axialführungseinrichtung an der Supporteinheit ausgerichtet ist.
Construction and operation of a compressed air jet device according to the invention are explained in more detail below:
  • A workpiece, such as in particular a tower segment of a wind turbine with a cone angle of for example 1 ° to 5 °, is fixedly positioned on the intended storage space, in such a way that the longitudinal axis of the workpiece is aligned substantially parallel to the longitudinal axis of the Axialführungseinrichtung on the support unit.

Die Supporteinheit enthält in Verbindung mit der Axialführungseinrichtung zu einem Zeitpunkt vor Beginn der Oberflächenbehandlung auch noch die Verfahreinheit samt der daran angesetzten Düsenträgereinheit.The support unit in conjunction with the Axialführungseinrichtung at a time prior to the start of the surface treatment also includes the track and the attached thereto nozzle carrier unit.

Eine Höhenverstellungseinrichtung an der Supporteinheit ermöglicht es, die Verfahreinheit zunächst auf die vorgesehene Höhe anzuheben, auf der das Einschieben der Verfahreinheit in das am Ende offene Werkstück möglich ist. Ist die Höhe entsprechend ausgerichtet, kann die Verfahreinheit mithilfe der Axialführungseinrichtung relativ zur Supporteinheit auf das Werkstück zu verschoben werden. Die Verfahreinheit wird dabei in das Innere des Endbereichs des Werkstücks hineingeschoben, wobei die Verfahreinheit samt der Düsenträgereinheit noch von der Supporteinheit gestützt wird.A height adjustment device on the support unit makes it possible to first raise the track to the intended height at which it is possible to insert the track into the workpiece that is open at the end. If the height is aligned accordingly, the track unit can be moved toward the workpiece relative to the support unit by means of the axial guide device. The moving unit is thereby pushed into the interior of the end region of the workpiece, wherein the moving unit together with the nozzle carrier unit is still supported by the support unit.

Die Verfahreinheit wird danach durch Absenken mittels der Höhenverstellungseinrichtung an der Supporteinheit oder durch Ausfahren eigener, längenverstellbarer Radträgerelemente mit seinen Rädern auf die gerundete Werkstückoberfläche abgesetzt. Sobald die Verfahreinheit mit ihren Rädern oder Rollen auf die Werkstückoberfläche aufgesetzt ist, kann die Verbindung zur Axialführungseinrichtung gelöst werden. Die Verfahreinheit ist dann mechanisch nicht mehr mit der Axialführungseinrichtung und der Supporteinheit gekoppelt, sondern kann selbsttätig innerhalb des Werkstücks verfahren werden. Es besteht lediglich noch eine Verbindung mit einer Strahlmittelzuführleitung und mit einer Energieleitung, die entsprechend flexibel ausgebildet sind.The positioning unit is then lowered onto the rounded workpiece surface by lowering it by means of the height adjustment device on the support unit or by extending its own, length-adjustable wheel carrier elements with its wheels. Once the track is placed with its wheels or rollers on the workpiece surface, the connection to the Axialführungseinrichtung can be solved. The positioning unit is then mechanically no longer coupled to the axial guidance device and the support unit, but can be moved automatically within the workpiece. There is only one connection to a Strahlmittelzuführleitung and with a power line, which are designed to be flexible.

Die Strahlmittelzuführleitung und/oder die Energieleitung können auf großen Haspeln, die an der Supporteinheit drehbar gelagert sind, aufgerollt und abgespult werden.The blasting agent supply line and / or the power line can be rolled up and unwound on large reels, which are rotatably mounted on the support unit.

Nachdem die Positionierung der Verfahreinheit auf der Werkstückoberfläche abgeschlossen ist, kann die Düsenträgereinheit aktiviert werden. Hierzu ist insbesondere vorgesehen, längenverstellbare Führungselemente für die Strahlmitteldüsen vorzusehen, um einen geeigneten Abstand der Strahlmitteldüsen zur Werkstückoberfläche von insbesondere 400 mm bis 500 mm einzustellen. Soweit die Verfahreinheit verstellbare Radträgerelemente aufweist, ist eine kontinuierliche Höhenverstellung entlang des Arbeits- und Verfahrweges derart vorgesehen, dass eine gleichmäßige Bewegung entlang der Mittelachse des Rohrabschnitts bzw. Turmsegments möglich ist.After the positioning of the track on the workpiece surface is completed, the nozzle carrier unit can be activated. For this purpose, it is provided in particular to provide length-adjustable guide elements for the blasting agent nozzles in order to set a suitable distance between the blasting medium nozzles and the workpiece surface, in particular from 400 mm to 500 mm. As far as the track unit adjustable wheel carrier elements a continuous height adjustment along the working and travel path is provided such that a uniform movement along the central axis of the pipe section or tower segment is possible.

Nach dem Ausrichten der Strahldüse gegenüber der Innenwandung des Werkstücks kann der Strahlbetrieb aufgenommen werden. Es wird das Strahlmittel durch die Strahlmittelzuführleitung zugeführt und die Werkstückoberfläche damit beschossen.After aligning the jet nozzle with respect to the inner wall of the workpiece, the blasting operation can be recorded. It is the blasting agent fed through the Strahlmittelzuführleitung and bombarded the workpiece surface.

Um eine Behandlung der Werkstückoberfläche über den gesamten Umfang zu erreichen, kann vorgesehen sein, die Druckluftstrahldüse an rotierbaren Düsenhalterelementen zu lagern, die dann alternierend um einen bestimmten Schwenkwinkel bewegt werden, um auf diese Weise größere Oberflächenbereiche zu überdecken. Sind beispielsweise zwei Strahldüsen an diametral gegenüberliegenden Seiten vorgesehen, ist eine Verschwenkung um etwa 190° vorgesehen, um eine lückenlose Behandlung der Werkstückoberfläche zu gewährleisten. Bevorzugt sind drei Strahldüsen vorgesehen, die in einem Winkel von jeweils 120° zueinander angeordnet sind. Diese Strahldüsen sind jeweils einzeln an in radialer Richtung längenverstellbaren Halterelementen gelagert. Die Halteelemente wiederum sind miteinander verbunden und als Einheit um einen bestimmten Schwenkwinkel drehbar, der im Falle einer Anordnung von drei Druckluftstrahldüsen bei etwa 130° liegt. Das ist etwas mehr als ein rechnerisches Drittel am Gesamtumfang, so dass durch Überlappungen sichergestellt ist, dass alle Oberflächenbereiche bestrahlt werden.In order to achieve a treatment of the workpiece surface over the entire circumference, it may be provided to store the compressed air jet nozzle on rotatable nozzle holder elements, which are then alternately moved by a certain pivot angle, so as to cover larger surface areas. For example, if two jet nozzles are provided on diametrically opposite sides, a pivoting of about 190 ° is provided to ensure a complete treatment of the workpiece surface. Preferably, three jet nozzles are provided, which are arranged at an angle of 120 ° to each other. These jet nozzles are each mounted individually on length-adjustable holder elements in the radial direction. The holding elements in turn are connected to each other and rotatable as a unit by a certain pivot angle, which is in the case of an arrangement of three compressed air jet nozzles at about 130 °. This is slightly more than a calculated third of the total circumference, so that overlaps ensure that all surface areas are irradiated.

Die Oberflächenbehandlung erfolgt dann in der Weise, dass unter fortwährender, oszillierender Hin- und Herbewegung der Trägereinheit für die Druckluftstrahldüsen Strahlmittel auf die Werkstückoberfläche gerichtet wird und zugleich eine Verschiebung entlang der Mittelachse des Werkstücks durch eigenständiges Verfahren der Verfahreinheit erfolgt, sodass eine durchgängige Oberflächenbehandlung bis in den Endbereich des Werkstücks möglich ist.The surface treatment is then carried out in such a way that under continuous oscillating reciprocating motion of the carrier unit for the compressed air jet blasting is directed to the workpiece surface and at the same time a displacement along the central axis of the workpiece by independent movement of the track is carried out so that a continuous surface treatment up to the end area of the workpiece is possible.

Insbesondere kann bei der Verfahreinheit vorgesehen sein, zwei Räderpaare mit Abstand in Längsrichtung zueinander vorzusehen, wobei diese Räder jeweils radial in Bezug die Mittelachse des Werkstücks bzw. senkrecht zur Werkstückoberfläche ausgerichtet sind. Beispielsweise können bei jedem Räderpaar zwei Räder vorgesehen sein, die im Querschnitt gesehen in einem Winkel von 120° zueinander ausgerichtet sind. Damit wird eine gute Abstützung sowohl gegen Nickbewegungen bei der Vorwärts- oder Rückwärtsbewegung in Längsrichtung erreicht, wie auch eine seitliche Abstützung dadurch, dass sich die Räder mit großer Abstützweite auf der konkaven Innenseite des Werkstücks abstützen können.In particular, it can be provided in the moving unit to provide two pairs of wheels at a distance in the longitudinal direction to each other, wherein these wheels are each aligned radially with respect to the central axis of the workpiece or perpendicular to the workpiece surface. For example, two wheels may be provided in each pair of wheels, which are seen in cross-section at an angle of 120 ° aligned with each other. Thus, a good support against both pitching movements in the forward or backward movement in the longitudinal direction is achieved, as well as a lateral support in that the Support wheels with large support on the concave inside of the workpiece.

Um insbesondere bei konisch zulaufenden Werkstücken wie den genannten Turmsegmenten für Windkraftanlagen zu erreichen, dass das Zentrum der Strahldüsenhalter, welches auch die Drehachse bildet, entlang der Mittelachse des Werkstücks verfahren wird, ist eine kontinuierliche Verstellung des Abstands der Räder von der Mittelachse erforderlich, wozu entweder einzelne, längenverstellbare Radhalterelemente Verwendung finden können oder auch Räder über Scherenelemente so miteinander verbunden sein können, dass eine Höhenverstellung erreicht wird.In particular, in the case of conically tapered workpieces, such as the wind turbine tower segments mentioned, in that the center of the jet nozzle holders, which also forms the axis of rotation, is moved along the central axis of the workpiece, a continuous adjustment of the distance of the wheels from the central axis is required, for which either individual, length-adjustable wheel holder elements can be used or wheels via scissor elements can be connected to each other so that a height adjustment is achieved.

Die Durchmesseranpassung innerhalb der Düsenträgereinheit kann dadurch erfolgen, dass jedes Düsenträgerhalteelement für sich längenverstellbar ist. Möglich sind aber auch gelenkige Anordnungen nach Art eines aufspannbaren Schirms, wo durch Verschiebung eines zentralen Speichenträgerelements die daran angelenkten Arme mehr oder weniger weit abgespreizt werden. Mit dieser Verstellmöglichkeit kann gerade bei konischen Werkstücken der Abstand der Düsen zur Wandung laufend angepasst werden.The diameter adjustment within the nozzle carrier unit can be effected in that each nozzle carrier holding element is adjustable in length. But also possible are articulated arrangements in the manner of a aufspannbaren screen, where displaced by displacement of a central spoke support member articulated arms more or less. With this adjustment, the distance of the nozzle to the wall can be adjusted continuously, especially in conical workpieces.

Dieses Schirmprinzip kann außer bei der Durchmesseranpassung der Düsenträgereinheit auch für das Fahrwerk der Verfahreinheit angewandt werden. Es ist hierbei jeweils nur ein linear wirkender Aktor erforderlich, um eine gleichmäßige radiale Verstellung von mehreren Düsen bzw. Rädern oder Radsätzen simultan bewirken zu können.This umbrella principle can be applied not only to the diameter adjustment of the nozzle carrier unit for the chassis of the track. In each case, only one linear-acting actuator is required in order to be able to simultaneously effect a uniform radial adjustment of a plurality of nozzles or wheels or wheelsets.

Die Räder der Verfahreinheit sind insbesondere als Niederdruckreifen ausgeführt, welche eine gute Haftung auf der Innenwandung des Werkstücks und eine Anpassung an die jeweilige Geometrie mit großer Auflagefläche ermöglichen.The wheels of the track are designed in particular as low-pressure tires, which allow good adhesion to the inner wall of the workpiece and an adaptation to the respective geometry with a large contact surface.

Nach dem Abschluss der Oberflächenbehandlung im Inneren des Werkstücks wird die Verfahreinheit samt der Düsenträgereinheit in eine endseitige Position zurück verfahren, an welcher eine erneute Ankopplung an die Axialführungseinrichtung der Supporteinheit erfolgt. Die Ankopplung kann beispielsweise derart erfolgen, dass die Axialführungseinrichtung einen oder mehrere ausschiebbare Träger aufweist, die unter den Massenschwerpunkt der Verfahreinheit geschoben werden. Durch Hochziehen der Radeinheiten senkt sich die Verfahreinheit dann auf die Träger der Axialführungseinrichtung ab. Hierbei können Zentrierhilfen vorgesehen sein, um eine exakte Lagepositionierung zu erreichen und beim anschließenden Zurückziehen der Verfahreinheit aus dem Werkstück heraus ein Abrutschen der Verfahreinheit zu vermeiden. Sobald die Verfahreinheit auf die Supporteinheit zurückgezogen worden ist, ist das Werkstück frei begehbar, sodass eventuelle manuelle Nacharbeiten und Kontrollen der Werkstückoberfläche erfolgen können. Hierzu ist es vorteilhaft, wenn die Verfahreinrichtung neben der Strahlmittelversorgungsleitung auch eine Saugleitung aufweist, um sich an der Unterseite sammelndes Strahlmittel kontinuierlich abzusaugen und damit einen anschließenden Reinigungsvorgang zu vermeiden oder zumindest deutlich zu verkürzen. Um zu vermeiden, dass Strahlmittel auf Oberflächenbereiche trifft, die unten liegend sind und mit Strahlmittel bedeckt sind, wodurch die Effekte der Behandlung gemindert werden, kann eine zusätzliche Abblasvorrichtung vorgesehen sein, die insbesondere mit der Düsenträgereinheit verbunden oder gekoppelt ist. Hieraus wird Druckluft gezielt auf die Werkstückoberfläche gegeben, um die zu behandelnden Oberflächenbereiche frei von Strahlmittel zu halten. Hierüber kann auch bei der Rückzugsbewegung der Verfahreinrichtung eine kontinuierliche Reinigung der Werkstückinnenseite über nahezu die gesamte Länge des Werkstücks erreicht werden.After completing the surface treatment in the interior of the workpiece, the moving unit together with the nozzle carrier unit is moved back into an end-side position at which a renewed coupling takes place to the axial guiding device of the support unit. The coupling can for example take place in such a way that the axial guide device has one or more extendable carriers, which are pushed under the center of mass of the moving part. By pulling up the wheel units, the positioning unit then lowers onto the carriers of the axial guidance device. In this case, centering aids can be provided in order to achieve an exact positioning and to prevent slippage of the moving part during the subsequent retraction of the moving part out of the workpiece. As soon as the moving part has been retracted to the support unit, the workpiece is freely accessible, so that possible Manual rework and checks of the workpiece surface can be done. For this purpose, it is advantageous if the traversing device in addition to the blasting agent supply line also has a suction line to continuously suck on the bottom collecting blasting agent and thus to avoid a subsequent cleaning process or at least significantly shorten. In order to avoid that blasting agents encounter surface areas which are lying down and are covered with blasting medium, whereby the effects of the treatment are reduced, an additional blow-off device may be provided which is in particular connected or coupled to the nozzle carrier unit. From this compressed air is deliberately added to the workpiece surface in order to keep the surface areas to be treated free of blasting agent. By means of this, continuous cleaning of the workpiece inner side over almost the entire length of the workpiece can also be achieved during the retraction movement of the traversing device.

Die Axialführungseinrichtung kann beispielsweise durch einen Schlitten gebildet werden, der mit seinen Rollen in Profilträgern geführt ist. Die Profile sind I- oder U-Profile mit Ober- und Untergurt, sodass ein Verkippen in Fahrtrichtung unterbunden ist.The Axialführungseinrichtung can be formed for example by a carriage, which is guided with its rollers in profile carriers. The profiles are I or U profiles with upper and lower belt, so that tilting in the direction of travel is prevented.

Die Erfindung wird nachfolgend mit Bezug auf die Zeichnungen näher erläutert. Die Figuren zeigen im Einzelnen:

Fig. 1
eine erfindungsgemäße Druckluftstrahlvorrichtung in schematischer, seitlicher Ansicht,
Fig. 2
ebenfalls in seitlicher Ansicht eine bevorzugte Ausbildung eines Radpaares der Verfahreinheit,
Fig. 3
eine alternative Ausbildung einer Radeinheit,
Fig. 4
Teile der Supporteinheit im Schnitt und
Fig. 5
eine mögliche Ausführungsform einer Düseneinheit.
The invention will be explained in more detail with reference to the drawings. The figures show in detail:
Fig. 1
a compressed air jet device according to the invention in a schematic, lateral view,
Fig. 2
also in a lateral view a preferred embodiment of a pair of wheels of the track,
Fig. 3
an alternative embodiment of a wheel unit,
Fig. 4
Parts of the support unit in section and
Fig. 5
a possible embodiment of a nozzle unit.

Fig. 1 zeigt eine Druckluftstrahlvorrichtung 100. Auf einem Fundament 1 ist ein schienenförmiges Basisgestell 11 einer Supporteinheit 10 angeordnet. Auf einem rollengelagerten Schlitten 12 ist die Verfahreinheit 20 mit einer Düseneinheit 30 verschiebbar gelagert. Die Verfahreinheit 20 liegt auf der Oberseite des Schlittens 12 an entsprechenden Zentriereinrichtungen auf. Ebenfalls ortsfest angeordnet ist eine Haspel 14 für eine Strahlmittelversorgungsleitung. Im rechten Bereich der Darstellung der Fig. 1 ist der Schlitten 12 mit der Düseneinheit 30 bereits in das Innere eines konisch zulaufenden Turmsegments 2 hineingeschoben. Durch die Linie 3 ist eine Trennung des Aufstellorts der Supporteinheit 10 von dem Lagerplatz für das Werkstück 2 angedeutet; hierbei kann es sich beispielsweise um eine Toröffnung einer Produktionshalle handeln. Fig. 1 shows a compressed air jet device 100. On a foundation 1, a rail-shaped base frame 11 of a support unit 10 is arranged. On a roller-mounted carriage 12, the moving unit 20 is displaceably mounted with a nozzle unit 30. The moving unit 20 rests on the upper side of the carriage 12 at corresponding centering devices. Also arranged stationary is a reel 14 for a blasting agent supply line. In the right section of the illustration of the Fig. 1 the carriage 12 with the nozzle unit 30 is already pushed into the interior of a conically tapered tower segment 2. Through the line 3, a separation of the installation of the support unit 10 is indicated by the storage space for the workpiece 2; this may be, for example, a door opening of a production hall.

Dementsprechend ist die Verfahreinheit 20 auf dem Schlitten 12 in Figur 1 doppelt dargestellt, nämlich links außerhalb des Werkstücks und rechts innerhalb des Werkstücks 2.Accordingly, the moving unit 20 is mounted on the carriage 12 in FIG FIG. 1 shown twice, namely left outside of the workpiece and right inside the workpiece. 2

Basisgestell 11, Schlitten 12 und eine Kupplungstange 13 sind Teil einer Axialführungseinrichtung. Erfindungsgemäß wird die Axialführungseinrichtung nur über einen kurzen Weg benötigt, nämlich um die Verfahreinheit 20 vollständig in den endseitigen Bereich des Werkstücks 2 hineinbringen zu können bzw. wieder daraus heraus.Base frame 11, carriage 12 and a coupling rod 13 are part of an axial guide device. According to the invention, the axial guidance device is required only over a short path, namely in order to be able to completely bring the traversing unit 20 into the end-side region of the workpiece 2 or back out of it.

Es ist eben nicht erforderlich, die Axialführungsvorrichtung so lang wie das Werkstück 2 auszuführen, da die Verfahreinheit 20 selbstverfahrend ausgebildet ist. Es muss eben lediglich ermöglicht werden, die Verfahreinrichtung 20 vom Schlitten 12 aus mittels der Kupplungsstange 13 freischwebend in den inneren Querschnittsbereich des Werkstücks 2 hineinschieben zu können, bis darin eine Absenkung des eigenen Fahrwerks möglich ist.It is just not necessary to carry out the Axialführungsvorrichtung as long as the workpiece 2, since the trajectory 20 is formed selbstverfahrend. It just has to be made possible to freely slide the traversing device 20 from the carriage 12 by means of the coupling rod 13 into the inner cross-sectional area of the workpiece 2, until it is possible to lower the own running gear.

Mögliche Ausbildungen der Supporteinheit 10 und der Verfahreinheit 20 sind in Fig. 2 näher dargestellt. Bei der links in der Darstellung gezeigten Supporteinheit 10 ist eine Höhenverstelleinrichtung 15 in Form von Spindeln realisiert, durch welche die Führungsschiene 11 , welche den Schlitten 12 der Axialführungseinrichtung trägt, in der Höhe verstellt werden kann.Possible configurations of the support unit 10 and the track 20 are in Fig. 2 shown in more detail. In the support unit 10 shown on the left in the illustration, a height adjustment device 15 in the form of spindles is realized, by means of which the guide rail 11, which carries the carriage 12 of the axial guide device, can be adjusted in height.

Erkennbar ist weiterhin, wie die rechts im Bild dargestellte Verfahreinheit 20 ausgebildet und positioniert ist. Hierbei sind Räder 21 an Radträgerelementen 22 aufgehängt, wobei die Radträgerelemente 22 wiederum an einem Gelenkkopf 23 verbunden sind. Über zusätzliche Speichen 24 kann durch Verschiebung des Knotenpunktes 25 der radiale Abstand der Räder von einer Mittelachse 4 verändert werden. In Fig. 2 ist das Zentrum der Räderanordnung der Verfahreinheit 20 bereits auf der Mittelachse 4 des Werkstücks 2 positioniert, indem die Höhenverstelleinrichtung 15 die Führungsschiene 11 und den Schlitten 12 angehoben hat.It can also be seen how the track unit 20 shown on the right in the image is formed and positioned. Here, wheels 21 are suspended from Radträgerelementen 22, wherein the Radträgerelemente 22 are in turn connected to a condyle 23. Additional spokes 24 can be changed by displacement of the node 25, the radial distance of the wheels from a central axis 4. In Fig. 2 is the center of the wheel assembly of the track 20 already positioned on the central axis 4 of the workpiece 2 by the height adjustment device 15, the guide rail 11 and the carriage 12 has raised.

Alternativ zu der Räderverstelleinrichtung bei der Verfahreinheit 20 in Fig. 2, die nach Art eines Schirmgestells funktioniert, ist bei einer Verfahreinheit 20' in Fig. 3 vorgesehen, an gegenüberliegenden Enden eines Trägerarms 22' jeweils Rollen 21' anzuordnen. Die Trägerarme 22' sind kreuzweise an einem Knotenpunkt 23' miteinander verbunden. Mittels der Verstellelemente 24' können die beiden Trägerarme 22' voneinander abgespreizt werden, wodurch sich der Abstand der unteren und oberen Räder 21' zueinander ändert und sich entsprechend die Höhe des Knotenpunktes 23', das das Zentrum bildet, gegenüber dem Werkstück 2 einstellen lässt. Durch eine entsprechende Anbindung der Düsenträgereinheit 30 an die Verfahreinheit 20' kann das Zentrum der Düsenträgereinheit auf die Mittelachse des Werkstücks 2 angehoben werden.As an alternative to the wheel adjusting device in the moving part 20 in FIG Fig. 2 , which works in the manner of a umbrella frame, is in a track 20 'in Fig. 3 provided, at opposite ends of a support arm 22 'respectively rollers 21' to be arranged. The support arms 22 'are interconnected crosswise at a node 23'. By means of the adjusting elements 24 ', the two support arms 22' spread apart from each other be, whereby the distance of the lower and upper wheels 21 'to each other changes and the height of the node 23', which forms the center, relative to the workpiece 2 can be adjusted accordingly. By a corresponding connection of the nozzle carrier unit 30 to the moving part 20 ', the center of the nozzle carrier unit can be raised to the central axis of the workpiece 2.

Teile der Axialführungseinrichtung in der Supporteinheit 10 sind in Fig. 4 gezeigt. Der Schlitten 12 ist über Rollenpaare, die mit ihren Rollen 16 jeweils nach außen weisen, in Profilträgern 11 gelagert, deren offene Profilseiten zueinander gewandt ausgerichtet sind. Die Rollen 16 können sich somit sowohl am Untergurt wie auch am Obergurt des Profilträgers 11 abstützen und sind darüber hinaus gegen seitliche Verschiebung gesichert.Parts of the axial guide device in the support unit 10 are in Fig. 4 shown. The carriage 12 is mounted on roller pairs, which point with their rollers 16 respectively outwardly in profile carriers 11, whose open profile pages are aligned facing each other. The rollers 16 can thus be supported both on the lower flange and on the upper flange of the profile support 11 and are also secured against lateral displacement.

Fig. 5 zeigt eine mögliche Ausführungsform einer Düseneinheit 30. Mehrere Druckluftstrahldüsen 31 sind an einer schirmförmigen Konstruktion angeordnet und weisen mit ihren Düsenmündungen radial nach außen. Über die schirmförmige Konstruktion ist eine Anpassung des radialen Abstands zur Innenwandung des Werkstücks 2 möglich. Dazu sind die Druckluftstrahldüsen 31 an Haltearmen 32 befestigt, die gelenkig an einem Gelenkkopf 33 verbunden sind. Über eine Verschiebung eines Knotenpunktes 35, an dem Speichenelemente 34 gelenkig angebunden sind, welche die Haltearme 32 stützen, kann der radiale Abstand der Druckluftstrahldüsen 31 von der Wandung des Werkstücks 2 verändert werden. Die Druckluftstrahldüsen 31 sind an bewegliche Strahlschläuche 37 angeschlossen, die der Anpassung des Durchmessers in der Düseneinheit 30 problemlos folgen. Fig. 5 shows a possible embodiment of a nozzle unit 30. Several compressed air jet nozzles 31 are arranged on a screen-like construction and have with their nozzle orifices radially outward. About the umbrella-shaped construction, an adaptation of the radial distance to the inner wall of the workpiece 2 is possible. For this purpose, the compressed air jet nozzles 31 are attached to retaining arms 32 which are hingedly connected to a joint head 33. About a displacement of a node 35, are connected to the spokes elements 34 hinged, which support the support arms 32, the radial distance of the compressed air jet nozzles 31 can be changed from the wall of the workpiece 2. The compressed air jet nozzles 31 are connected to movable jet tubes 37, which easily follow the adjustment of the diameter in the nozzle unit 30.

Die Positionierung der Mittelachse der Anordnung der Strahlmitteldüsen 31 in der Düseneinheit 30 ist durch die zuvor beschriebenen Verstellmöglichkeiten der Verfahreinheit 20 möglich, um die Düseneinheit 30 auf der Mittelachse 4 des Werkstücks 2 zu positionieren.The positioning of the central axis of the arrangement of the abrasive nozzles 31 in the nozzle unit 30 is possible by the previously described adjustment possibilities of the moving unit 20 in order to position the nozzle unit 30 on the central axis 4 of the workpiece 2.

Zusätzlich kann eine Abblaseinrichtung 36 vorgesehen sein, um gerade im Bodenbereich, wo sich das Strahlmittel sammelt, den Wirkungsbereich der Druckluftstrahldüsen 31 frei zu halten.In addition, a blow-off device 36 may be provided in order to keep the area of action of the compressed-air jet nozzles 31 free, especially in the bottom area where the blasting agent collects.

Claims (12)

  1. Compressed-air blasting device (100) for blasting the interior of pipe sections and tower segments (2), having at least one compressed-air blasting nozzle (31) connected to a blasting-agent feed line,
    characterized by:
    - a fixed support unit (10) which is positioned outside a storage place for a work piece and has at least one axial guiding device (11, 12), oriented parallel to the longitudinal extent of the work piece (2), and a height adjustment device (15) for lifting and lowering a travelling unit (20, 20') having a nozzle carrier unit (30);
    - the self-propelled travelling unit (20, 20') which can be coupled to the axial guiding device (12, 13) and can be set down onto the inner wall of the work piece (2), which travelling unit is connected to a blasting-agent feed line and an energy line,
    - and the nozzle carrier unit (30) which is connected to the travelling unit (20', 20') on which nozzle carrier unit the at least one compressed-air blasting nozzle (31) is arranged.
  2. Compressed-air blasting device (100) according to Claim 1, characterized in that the compressed-air blasting nozzles (31) are each individually mounted on a nozzle holder element which is length-adjustable in the radial direction.
  3. Compressed-air blasting device (100) according to Claim 1 or 2, characterized in that the compressed-air nozzle (31) is mounted on a rotatable nozzle holder element which can be moved in alternating fashion through a pivoting angle.
  4. Compressed-air blasting device (100) according to one of Claims 1 to 3, characterized in that three compressed-air blasting nozzles (31) are provided which are each arranged at an angle of 120° to one another.
  5. Compressed-air blasting device (100) according to one of Claims 1 to 4, characterized in that the nozzle carrier unit (30) is designed in the manner of an openable umbrella, wherein, by displacing a central spoke carrier element (33), the arms (32) articulated thereon can be splayed out.
  6. Compressed-air blasting device (100) according to one of Claims 1 to 5, characterized in that the travelling unit (20') has two wheel pairs with a distance in the longitudinal direction from one another, wherein the wheels (21) are each oriented radially with respect to the centre axis (4) of the work piece (2) or perpendicularly to the work piece surface.
  7. Compressed-air blasting device (100) according to one of Claims 1 to 6, characterized in that the wheels (21) are connected to one another via scissors elements in the travelling unit (20, 20').
  8. Compressed-air blasting device (100) according to one of the preceding claims, characterized in that the travelling unit (20, 20') has length-adjustable wheel carrier elements.
  9. Method for blasting the interior of pipe sections and tower segments (2) with a compressed-air blasting nozzle (31), comprising at least the following steps:
    - horizontally positioning a work piece (2), which is tubular or in the form of a portion of a cone, on a storage place;
    - aligning the centre axis (4) of the work piece (2) with the longitudinal axis of an axial guiding device (12, 13) on a fixed support unit (10) which is arranged outside the storage place;
    - coupling a travelling unit (20) with the axial guiding device (12, 13);
    - inserting the travelling unit (20) together with a nozzle carrier unit (30) having at least one compressed-air blasting nozzle (31) into the interior of the work piece (2) by means of the axial feeding device (12, 13);
    - lowering the travelling unit (20) having the nozzle carrier unit (30) or the wheels of the travelling unit (20) and setting the wheels (21) of the travelling unit (20) onto the inner wall of the work piece (2);
    - releasing the travelling unit (20) from the axial feeding device (12, 13);
    - carrying out the blasting of the work piece surface with oscillating movement of the compressed-air blasting nozzle (31) and moving the travelling unit (20) along the work piece centre axis (4).
  10. Method according to Claim 9, characterized in that, after the blasting, the travelling unit (20) is lifted and coupled to the axial feeding device (12, 13) and is withdrawn from the work piece (2) by means of the axial feeding device (12, 13).
  11. Method according to Claim 9 or 10, characterized in that the distance between the compressed-air blasting nozzle (31) on the nozzle unit (30) and the inner wall of the work piece (2) is set or readjusted before and/or during the blasting operation.
  12. Method according to one of Claims 9 to 11, characterized in that, in the case of conical work pieces (2), the distance of the wheels (21) from the centre axis (4) is adjusted during the movement of the travelling unit (20, 20') along the centre axis (4).
EP14755328.3A 2013-07-25 2014-07-17 Compressed-air blasting device for blasting the interior of pipe segments and tower segments Not-in-force EP3024620B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102013107966.0A DE102013107966B4 (en) 2013-07-25 2013-07-25 Compressed air blasting device for internal blasting of pipe sections and tower segments
PCT/DE2014/100262 WO2015010688A1 (en) 2013-07-25 2014-07-17 Compressed-air blasting device for blasting the interior of pipe segments and tower segments

Publications (2)

Publication Number Publication Date
EP3024620A1 EP3024620A1 (en) 2016-06-01
EP3024620B1 true EP3024620B1 (en) 2016-12-21

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ID=51398472

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Application Number Title Priority Date Filing Date
EP14755328.3A Not-in-force EP3024620B1 (en) 2013-07-25 2014-07-17 Compressed-air blasting device for blasting the interior of pipe segments and tower segments

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Country Link
EP (1) EP3024620B1 (en)
DE (1) DE102013107966B4 (en)
WO (1) WO2015010688A1 (en)

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD254851A3 (en) * 1974-07-09 1988-03-16 Robert Kunze METHOD AND DEVICE FOR AUTOMATIC TREATMENT OF THE WELDING AND INSIDE RADIATION OF HUEL BODIES OR TUBES INSERTED IN TUBE BOARDS
SE7413891L (en) * 1974-11-06 1976-05-07 Aplicator Ab APPLIANCE FOR INTERIOR SURFACE TREATMENT OF TUBE-SHAPED ELEMENTS
FR2450668A1 (en) * 1979-03-08 1980-10-03 Lutelec Luchaire Equip Automatic sand-blasting equipment for transport container interiors - consists of wheeled carriage with blasting jet control section to treat all surfaces
DE3939888C1 (en) * 1989-11-30 1991-01-10 Mannesmann Ag, 4000 Duesseldorf, De
DE10053891A1 (en) * 2000-10-31 2003-06-18 Industrieanstriche Friedrich T Device for clearing deposits from and de-rusting inside of pipes of large nominal width has carriage movable in pipeline and equipped with jet head and with running wheels lying on inner wall of pipe
DE102005018852B4 (en) * 2005-04-22 2007-11-08 SLF Oberflächentechnik GmbH Device for processing the inner surface of tubular components
EP2514562A1 (en) * 2011-04-21 2012-10-24 Zinguerie Sablage Metallisation S.A. Device and method for sandblasting a pipe

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
None *

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Publication number Publication date
WO2015010688A1 (en) 2015-01-29
DE102013107966A1 (en) 2015-01-29
DE102013107966B4 (en) 2016-03-24
EP3024620A1 (en) 2016-06-01

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