EP2864068B1 - Device for bending pipes for pipelines - Google Patents

Device for bending pipes for pipelines Download PDF

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Publication number
EP2864068B1
EP2864068B1 EP13729265.2A EP13729265A EP2864068B1 EP 2864068 B1 EP2864068 B1 EP 2864068B1 EP 13729265 A EP13729265 A EP 13729265A EP 2864068 B1 EP2864068 B1 EP 2864068B1
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EP
European Patent Office
Prior art keywords
basic body
contact element
chassis
pipe
force
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EP13729265.2A
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German (de)
French (fr)
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EP2864068A1 (en
Inventor
Oliver Baum
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Maats Beheer Bv
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Maats Beheer BV
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D9/00—Bending tubes using mandrels or the like
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/08—Tube expanders
    • B21D39/20—Tube expanders with mandrels, e.g. expandable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D9/00—Bending tubes using mandrels or the like
    • B21D9/01—Bending tubes using mandrels or the like the mandrel being flexible and engaging the entire tube length
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D9/00—Bending tubes using mandrels or the like
    • B21D9/01—Bending tubes using mandrels or the like the mandrel being flexible and engaging the entire tube length
    • B21D9/03—Bending tubes using mandrels or the like the mandrel being flexible and engaging the entire tube length and built-up from loose elements, e.g. series of balls

Definitions

  • the invention relates to a device for bending pipes, according to the preamble of claim 1, such as from the DE10 2008 060897 A1 known.
  • Pipes are used in pipelines such as pipelines that carry large amounts of liquids or gases over long distances.
  • the transported media include petroleum, chemicals and / or drinking water.
  • pipelines around the world for carrying both liquid and gaseous substances over long distances are generally composed of sections of individual pipes 12 to 18 meters in length.
  • the pipes mostly have a diameter of 4 to well over 75 inches and are welded together to form a pipeline on the surface of the earth, underground and / or laid in the water.
  • the pipelines follow the general contour of the earth's surface.
  • the course of the pipelines can in particular be horizontal and vertical Extension can also be diverted or otherwise guided around obstacles.
  • a major challenge in the planning and construction of such pipelines is to join the ends of the individual pipes with high-quality welded joints.
  • changes of direction in the pipeline are necessary.
  • Changes in direction in pipelines can be produced by welding individual pipe sections, especially in the case of pipes with a large diameter.
  • the change in direction in the pipe must be produced by bending the pipe.
  • a bend is achieved by performing numerous small, arrayed bending steps in the pipe.
  • the desired bending radius is generated in the form of a polygon.
  • Skilled operators can efficiently control the tube benders to create precise bends in the tubes while minimizing the number of damaged or improperly bent tubes that result in wasted time and raw materials such as energy and tubes.
  • the tube and the bending device After each bending process, the tube and the bending device must be moved relative to one another with great precision. Both a movement of the pipe in the bending device and a movement of the bending device itself are possible. The latter variant has the disadvantage that the pipe has to be realigned in the bending device. Moving the large diameter pipes, precisely moving the mandrel and controlling the generated bend are associated with a high level of personnel and energy requirements.
  • benders are generally massive in nature and operated hydraulically.
  • a bending device is generally known from US Pat U.S. 3,834,210 and the U.S. 5,092,150 known. Such bending devices have devices for gripping the pipe, moving the pipe in the bending device, and creating the bend in the pipe. These devices are all hydraulically operated under the control of an operator.
  • the pamphlet DE 600 28 484 T2 Figure 3 shows a conventional bending device adapted to create bends in a large diameter pipe.
  • the flexure generally includes a reinforced frame to which the components are anchored against relative movement.
  • the main components of the pipe bending device comprise a bending tool, a mandrel, also called a mandrel, a support device and a fastening shoe.
  • the bending tool is a solid body which is stationary with respect to the frame and has a curved surface facing the pipe, the bending tool being pressed against the pipe during the bending process.
  • the support device is actuated by hydraulic pressure during the bending process and swiveled in the direction of the bending tool. Meanwhile, the fastening shoe fixes the pipe.
  • the mandrel is a rigid, limbed construction that allows the tube to be bent without changing the circular nature of the tube at the bend. Such mandrels are known in the art.
  • bending devices usually have three working areas in which the forces required for bending the pipe are transmitted to the pipe. During the bending process, there is an active introduction of force in a work area a hydraulic cylinder. The remaining passive work areas serve as abutments and are connected to the active work area via the frame.
  • the DE 696 03 499 T2 shows a bending device in which the middle of the three work areas is designed as an active work area.
  • a method for automating a bending device and a control with a programmable processor are also known. Automation is required precisely in order to carry out incremental and / or step-by-step bends with a high degree of repeatability and accuracy. If the quality is higher, the duration of the entire bending process should be reduced and the transport weight and the energy requirement of the bending device should be reduced at the same time.
  • a device mentioned at the beginning is from DE 10 2008 060 897 known.
  • a bending device is provided which, at least with its parts that are essential for the function of the bending machine, can be positioned completely in the interior of the pipe to be bent.
  • damage to the outside of the pipe applied coating for example a paint, insulation and / or synthetic resin reinforcement, principle avoided.
  • a bending device which carries out the bend inside the pipeline. It has 2 active work areas (front and rear) whereas the middle work area is passive. The exact application of force to both separate work areas is disadvantageous here.
  • the contact elements are provided on the carrier of the bending device, two contact elements on a first side of the carrier at the ends of the carrier and one contact element on a second side opposite the first side of the carrier are arranged in the middle of the carrier.
  • the contact elements can be placed on the inner surface of the tube, in particular in a form-fitting manner. This makes it possible for the bending device to adapt to the inner surface of the pipe when the forces necessary for bending are introduced into the pipe, thus avoiding damage to the pipe.
  • the contact elements also consist of a type of rubber, hardwood, an aluminum alloy and / or a plastic with an appropriate Shore hardness.
  • This device is in need of improvement with regard to the bending accuracy, especially with regard to coated pipes.
  • the invention is based on the object of creating a bending device with which the coated pipe can be bent with greater accuracy.
  • Figs. 1 to 5 show a first embodiment, not according to the invention, of a bending device 10.
  • the bending device 10 has a base body 11, at the front and rear ends of which a chassis 12 is arranged.
  • Two contact elements 13, 14 are provided on the upper side 16 of the base body 11.
  • the underside 17 of the base body 11 has a bend 18.
  • a contact element 15 is provided centrally on the underside 17.
  • the contact element 13 is designed to be movable in the direction of movement A.
  • the contact element has a bracket 19 which connects the contact element 13 to the base body 11 via a pivot point 20.
  • the boom 19 is connected via a second pivot point 21.
  • a routing element 22 which is connected to a force introduction element 23.
  • the force introduction element 23 is a hydraulic cylinder.
  • the hydraulic cylinder 23 has a piston rod 24. This is connected to a wedge 27 on its side facing away from the cylinder chamber 25 via a pin connection 26.
  • the wedge 27 has a wedge surface 28 on which a second wedge 29 is movably arranged.
  • the wedge 29 is rotatably connected to a carrier 30, on which the contact element 13 is arranged.
  • a base 32 is arranged in the interior of the base body 11.
  • the hydraulic cylinder 23 has a lower cylinder eye 33. This is connected to the base body 11 via a pin connection 34.
  • the cylinder eye 33 has an outer surface 35.
  • the base 32 has a corresponding inner surface 36.
  • the contact element 14 and the contact element 15 are each fixed, but exchangeable, arranged on the base body 11.
  • the chassis 12 is designed as follows in this embodiment.
  • a receiving element 38 is arranged on the end face 37 of the base body 11.
  • a pivot element 39 is rotatably mounted on the receiving element 38.
  • a pendulum element 40 is rotatably arranged on the pivot element 39.
  • a hydraulic motor 41 which is connected to a drive shaft 43 via a drive pinion 42, is arranged inside the pendulum element 40.
  • the drive shaft 43 is connected to the drive wheels 44.
  • the bending device 10 is moved into and out of the pipe via the drive wheels 44.
  • Using the pivot element 39 it is possible to raise the chassis 12 so that the contact element 15 comes into contact with the inner wall 102 of the pipe 100 and the drive wheels 44 detach from the inner wall 102 of the pipe 100.
  • FIGS. 6 to 9 show a second embodiment of the bending device 10 not according to the invention.
  • a chassis 12 is arranged on the base body 11 at the front and rear ends.
  • a contact element 13 and a contact element 14 are located on the front and rear ends of the top 16, respectively.
  • a contact element 15 is fixedly arranged in the center of the bottom 17.
  • the underside 17 has a bend 18.
  • the front contact element 13 and the rear contact element 14 are connected to one another via two cables 45 as travel limiters and guides.
  • the structure of the route diversion element 22 and the force introduction element 23 corresponds to the first embodiment.
  • Fig. 7 is shown, is that Contact element 13 is additionally connected to base body 11 via spring elements 46.
  • the spring elements 46 serve to move the contact element 13 back into its starting position when the hydraulic cylinder 23 is retracted.
  • the front chassis 12 has an axis 47 which is arranged in the longitudinal direction of the base body 11 on the end face 37 of the base body 11.
  • a sleeve 48 is arranged around the axis 47, rotatably mounted.
  • a carrier element 49 is arranged fixedly on the sleeve 48.
  • a pendulum element 50 is arranged on the carrier element 49 via arm 51.
  • the pendulum element 50 has a receptacle 52 for wheels 53.
  • Fig. 10 the use of the bending process 10 according to the second embodiment when bending a pipe 100 is shown.
  • the pipe 100 is composed of a pipeline pipe 103 and a coating 101, for example made of rigid PUR foam.
  • the bending device 10 has moved into the pipe 100.
  • An already bent region 104 of the pipeline 100 is shown.
  • the chassis 12 of the bending device 10 is retracted so that the contact element 15 is in contact with the inner wall 102 of the pipeline pipe 103.
  • the contact element 13 is extended via the hydraulic cylinder 23 and the routing element 22, in which the wedge 27 is moved by the piston rod 24 of the hydraulic cylinder and the wedge 29 is moved upwards on the wedge surface 28 of the wedge 27 until the contact element 13 with the Inner wall 102 comes into contact.
  • the contact element 13 is then pressed against the inner wall 102 of the pipe 100 and the pipeline pipe 103 of the pipe 100 undergoes a bend.
  • the elastic deformation of the pipe must first be overcome. Then there is a plastic deformation of the Pipe instead, so that a corresponding deformation is carried out.
  • the piston rod 24 is retracted via the hydraulic cylinder, whereby the wedge 29 can move downwards out of the wedge surface 28. Since the contact surface 13 is prevented from moving other than back into the base body 11 via the cables 45, the contact element 13 is brought back into its basic position via the spring elements 46. The elastic component of the bending process is recorded and taken into account when controlling the bending for accuracy.
  • the chassis 12 is then extended again and the bending device 10 can be moved out of the pipe to the next bending location, in which the next bending increment can then be carried out accordingly.
  • FIGS Figures 11 and 12 An embodiment of a bending device 10 according to the invention is shown in FIGS Figures 11 and 12 shown.
  • chassis 12 On both sides of the base body 11, chassis 12 are arranged, which have a structure of the chassis part 12 of the second embodiment, which is located in the area of the contact element 13.
  • the contact element 13 is in turn arranged movably via a corresponding path diversion element 22 and a force introduction element 23.
  • Guide arms 55 are arranged between the contact element 13 and the base body 11.
  • the lower contact element 15 extends along a straight section of the base body 11 from the beginning of the curved section of the base body 11 to the end of the base body 11 on which the contact element 14 is arranged.
  • the contact element 15 is fixedly arranged on the underside 17 over the entire length of the straight section.
  • the contact element 14 can be moved away from the base body 11 in the direction of movement C.
  • a hydraulic cylinder 56 is provided for this, which is connected to a sliding element 57 on which wedges 58 are arranged.
  • the contact element 14 is arranged on a carrier element 59.
  • Wedges 60 are arranged on the underside of the carrier element 59 and are arranged displaceably on a wedge surface 61 of the wedges 58. If the hydraulic cylinder 56 is extended, the wedges 58 are moved relative to the wedges 60, so that the wedges 60 are displaced on the wedge surfaces 61 in the direction of movement C, so that the contact element 14 is moved against the inner wall 102 of the pipe 100.
  • the contact element 14 is extended until it comes into contact with the inner wall 102.
  • the end of the bending device 10 which points to the not yet bent part of the pipe 100, is wedged within the pipeline pipe 103 and thereby locked. Then the contact element 13 is extended in the direction of movement A via the hydraulic cylinder 23 and the path diversion element 22 until the contact element 13 reaches the inner wall 102 of the pipeline pipe 103 and touches it. Then, as previously described, the tube is bent.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Description

Die Erfindung betrifft Vorrichtung zum Biegen von Rohren, gemäß dem Oberbegriff des Anspruchs 1, wie z.B. aus der DE10 2008 060897 A1 bekannt.The invention relates to a device for bending pipes, according to the preamble of claim 1, such as from the DE10 2008 060897 A1 known.

Diese Rohre werden bei Rohrleitungen wie Pipelines verwendet, die große Mengen an Flüssigkeiten oder Gasen über weite Strecken führen. Die transportierten Medien sind unter anderem Erdöl, Chemikalien und/oder Trinkwasser.These pipes are used in pipelines such as pipelines that carry large amounts of liquids or gases over long distances. The transported media include petroleum, chemicals and / or drinking water.

Weltweit existieren Rohrleitungen zum Führen von sowohl flüssigen als auch gasförmigen Stoffen über große Strecken. Diese Rohrleitungen sind im Allgemeinen aus Abschnitten einzelner Rohre mit Längen von 12 bis 18 Metern zusammengesetzt. Die Rohre weisen zumeist einen Durchmesser von 4 bis weit über 75 Inch auf und sind zu einer Rohrleitung zusammengeschweißt auf der Erdoberfläche, unterirdisch und/oder im Wasser verlegt. Häufig folgen die Rohrleitungen der allgemeinen Kontur der Erdoberfläche. Der Verlauf der Rohrleitungen kann insbesondere in seiner horizontalen und vertikalen Erstreckung auch umgeleitet oder in sonstiger Weise um Hindernisse herumgeführt sein.There are pipelines around the world for carrying both liquid and gaseous substances over long distances. These pipelines are generally composed of sections of individual pipes 12 to 18 meters in length. The pipes mostly have a diameter of 4 to well over 75 inches and are welded together to form a pipeline on the surface of the earth, underground and / or laid in the water. Often the pipelines follow the general contour of the earth's surface. The course of the pipelines can in particular be horizontal and vertical Extension can also be diverted or otherwise guided around obstacles.

Eine große Herausforderung bei der Planung und dem Bau von derartigen Rohrleitungen besteht darin, die Enden der einzelnen Rohre mit qualitativ hochwertigen Schweißverbindungen zu fügen. Um der Kontur der Erdoberfläche zu folgen und etwaige Hindernisse in dem Verlauf der Rohrleitungen zu umgehen, sind Richtungsänderungen in der Rohrleitung notwendig. Beim Erzeugen der Richtungsänderungen wird weitestgehend versucht, auf Schweißverbindungen zu verzichten. Richtungsänderungen in Rohrleitungen können, gerade bei Rohren mit einem großen Durchmesser, durch Verschweißen einzelner Rohrstücke erzeugt werden. Um die Anzahl der Schweißverbindungen zu minimieren und die Zuverlässigkeit der Rohrleitungen somit zu erhöhen, muss die Richtungsänderung in dem Rohr durch Biegen des Rohrs erzeugt werden.A major challenge in the planning and construction of such pipelines is to join the ends of the individual pipes with high-quality welded joints. In order to follow the contour of the earth's surface and avoid any obstacles in the course of the pipelines, changes of direction in the pipeline are necessary. When generating the changes in direction, an attempt is made as far as possible to dispense with welded connections. Changes in direction in pipelines can be produced by welding individual pipe sections, especially in the case of pipes with a large diameter. In order to minimize the number of welded joints and thus to increase the reliability of the pipelines, the change in direction in the pipe must be produced by bending the pipe.

Wie es bei Rohren großen Durchmessers üblich ist, wird eine Biegung erreicht, indem zahlreiche kleine, angeordnete Biegeschritte in dem Rohr durchgeführt werden. Der gewünschte Biegeradius wird also in Form eines Polygons erzeugt. Bei einer solchen Biegesystematik hat die Bedienungsperson die vollständige Kontrolle über die Anzahl der zu erzeugenden inkrementellen und/oder schrittweisen Biegungen, über den Abstand zwischen den inkrementellen und/oder schrittweisen Biegungen sowie über das Ausmaß jeder inkrementellen und/oder schrittweisen Biegung in dem Rohr. Erfahrene Bedienungspersonen können die Rohrbiegemaschinen effizient steuern, um präzise Biegungen in den Rohren zu erzeugen und dabei die Anzahl der beschädigten oder fehlerhaft gebogenen Rohre zu minimieren, die in einer Verschwendung von Zeit und Rohstoffen wie Energie und Rohre resultieren.As is common with large diameter pipes, a bend is achieved by performing numerous small, arrayed bending steps in the pipe. The desired bending radius is generated in the form of a polygon. With such a bend scheme, the operator has complete control over the number of incremental and / or incremental bends to be made, the distance between the incremental and / or incremental bends, and the extent of each incremental and / or incremental bend in the pipe. Skilled operators can efficiently control the tube benders to create precise bends in the tubes while minimizing the number of damaged or improperly bent tubes that result in wasted time and raw materials such as energy and tubes.

Nach jedem Biegevorgang müssen Rohr und Biegevorrichtung relativ zueinander mit hoher Präzision bewegt werden. Dabei ist sowohl eine Bewegung des Rohres in der Biegevorrichtung als auch eine Bewegung der Biegevorrichtung selbst möglich. Die letztere Variante hat den Nachteil, dass das Rohr erneut in der Biegevorrichtung ausgerichtet werden muss. Das Bewegen der Rohre mit großem Durchmesser, das präzise Versetzen des Dorns und die Kontrolle der erzeugten Biegung sind mit einem hohen personellen Aufwand und Energiebedarf verbunden.After each bending process, the tube and the bending device must be moved relative to one another with great precision. Both a movement of the pipe in the bending device and a movement of the bending device itself are possible. The latter variant has the disadvantage that the pipe has to be realigned in the bending device. Moving the large diameter pipes, precisely moving the mandrel and controlling the generated bend are associated with a high level of personnel and energy requirements.

Aufgrund der Größe der zu biegenden Rohre sind Biegevorrichtungen im Allgemeinen in ihrer Art massiv und werden hydraulisch betrieben. Eine Biegevorrichtung ist allgemein aus der US 3,834,210 und der US 5,092,150 bekannt. Solche Biegevorrichtungen haben Vorrichtungen zum Greifen des Rohres, zum Bewegen des Rohres in der Biegevorrichtung und zum Erzeugen der Biegung in dem Rohr. Diese Einrichtungen werden alle unter der Steuerung einer Bedienungsperson hydraulisch betrieben.Because of the size of the tubes to be bent, benders are generally massive in nature and operated hydraulically. A bending device is generally known from US Pat U.S. 3,834,210 and the U.S. 5,092,150 known. Such bending devices have devices for gripping the pipe, moving the pipe in the bending device, and creating the bend in the pipe. These devices are all hydraulically operated under the control of an operator.

Die Druckschrift DE 600 28 484 T2 zeigt eine konventionelle Biegevorrichtung, die zum Erzeugen von Biegungen in einem Rohr großen Durchmessers angepasst ist. Die Biegevorrichtung enthält im Allgemeinen einen verstärkten Rahmen, an dem die Komponenten gegen relative Bewegung verankert sind. Die Hauptkomponenten der Rohrbiegeeinrichtung umfassen ein Biegewerkzeug, einen Dorn, auch Mandrel genannt, eine Abstützeinrichtung und einen Befestigungsschuh. Das Biegewerkzeug ist ein fester und in Bezug auf den Rahmen stationärer Körper mit einer dem Rohr zugewandten, gekrümmten Fläche, wobei das Biegewerkzeug während des Biegevorgangs gegen das Rohr gedrückt wird. Die Abstützeinrichtung wird während des Biegevorgangs durch einen hydraulischen Druck betätigt und in Richtung des Biegewerkzeugs verschwenkt. Der Befestigungsschuh fixiert derweil das Rohr. In den Arbeitsbereichen der Biegevorrichtung werden während des Biegevorgangs mittels des Biegewerkzeugs, der Abstützeinrichtung und des Befestigungsschuhs Kräfte auf das Rohr übertragen, sodass sich dieses verformt. Der Dorn ist eine starre, mit Gliedern versehene Konstruktion, die es zulässt, dass das Rohr gebogen wird, ohne die kreisförmige Art des Rohres an der Biegestelle zu verändern. Derartige Dorne sind im Stand der Technik bekannt.The pamphlet DE 600 28 484 T2 Figure 3 shows a conventional bending device adapted to create bends in a large diameter pipe. The flexure generally includes a reinforced frame to which the components are anchored against relative movement. The main components of the pipe bending device comprise a bending tool, a mandrel, also called a mandrel, a support device and a fastening shoe. The bending tool is a solid body which is stationary with respect to the frame and has a curved surface facing the pipe, the bending tool being pressed against the pipe during the bending process. The support device is actuated by hydraulic pressure during the bending process and swiveled in the direction of the bending tool. Meanwhile, the fastening shoe fixes the pipe. In the working areas of the bending device, forces are transferred to the pipe during the bending process by means of the bending tool, the support device and the fastening shoe, so that it is deformed. The mandrel is a rigid, limbed construction that allows the tube to be bent without changing the circular nature of the tube at the bend. Such mandrels are known in the art.

Wie bereits die oben genannte Biegevorrichtung zeigt, weisen Biegevorrichtungen üblicher Weise drei Arbeitsbereiche auf, in denen die zum Biegen des Rohres benötigten Kräfte auf des Rohr übertragen werden. Beim Biegevorgang erfolgt in einem Arbeitsbereich eine aktive Krafteinleitung mittels eines Hydraulikzylinders. Die übrigen passiven Arbeitsbereiche dienen als Widerlager und sind über den Rahmen mit dem aktiven Arbeitsbereich verbunden. Die DE 696 03 499 T2 zeigt eine Biegevorrichtung, bei der der mittlere der drei Arbeitsbereiche als aktiver Arbeitsbereich ausgeführt ist.As the above-mentioned bending device already shows, bending devices usually have three working areas in which the forces required for bending the pipe are transmitted to the pipe. During the bending process, there is an active introduction of force in a work area a hydraulic cylinder. The remaining passive work areas serve as abutments and are connected to the active work area via the frame. The DE 696 03 499 T2 shows a bending device in which the middle of the three work areas is designed as an active work area.

Zum Biegen derartiger Rohre mit großem Durchmesser müssen große Kräfte aufgebracht werden. Entsprechend groß und massiv müssen die notwendigen Biegevorrichtungen und der Dorn ausgeführt sein. Das für den Einsatz derartig großer Biegevorrichtungen benötigte Equipment wie beispielsweise Dieselaggregate, Hydraulikpumpen und Dorne ist ebenfalls von großem Volumen und großer Masse. Insgesamt ist festzustellen, dass der Betrieb derartiger Biegevorrichtungen beim Transport und am Einsatzort hohe Anforderungen an den Platzbedarf stellt. Zu den hohen Kosten der Logistik addieren sich die Kosten für Verbrauchsstoffe, insbesondere Treibstoffe und Energieträger.In order to bend such large diameter pipes, large forces must be applied. The necessary bending devices and the mandrel must be designed accordingly large and massive. The equipment required for the use of such large bending devices, such as diesel units, hydraulic pumps and mandrels, is also of great volume and mass. Overall, it can be stated that the operation of such bending devices during transport and on site makes high demands on the space requirements. In addition to the high costs of logistics, the costs for consumables, especially fuel and energy sources, are added.

Den Arbeitsaufwand reduzierend ist aus der DE 600 28 484 T2 außerdem ein Verfahren zur Automatisierung einer Biegevorrichtung und eine Steuerung mit einem programmierbaren Prozessor bekannt. Gerade um inkrementelle und/oder schrittweise Biegungen mit einem hohen Grad an Wiederholbarkeit und Genauigkeit durchzuführen, ist eine Automatisierung erforderlich. Bei einer höheren Qualität sollte die Dauer des gesamten Biegevorgangs reduziert werden und so gleichzeitig das Transportgewicht und der Energiebedarf der Biegevorrichtung verringert werden.Reducing the workload is from the DE 600 28 484 T2 a method for automating a bending device and a control with a programmable processor are also known. Automation is required precisely in order to carry out incremental and / or step-by-step bends with a high degree of repeatability and accuracy. If the quality is higher, the duration of the entire bending process should be reduced and the transport weight and the energy requirement of the bending device should be reduced at the same time.

Eine Eingangs genannte Vorrichtung ist aus der DE 10 2008 060 897 bekannt. Hier ist eine Biegevorrichtung vorgesehen, welche zumindest mit ihren für die Funktion der Biegemaschine wesentlichen Teilen vollständig in dem Inneren des zu biegenden Rohres positionierbar ist. Hierdurch ist es möglich, dass die Biegevorrichtung die zum Biegen des Rohres notwendigen Kräfte von innen auf das Rohr aufbringt. Hierdurch ist es einerseits möglich, auf einen Dorn und/oder Mandrel zu verzichten, da die Biegevorrichtung selber zugleich die innere Form des Rohres stützt und die Biegung in dem Rohr erzeugt. Dies führt zu einem geringen Arbeitsaufwand und auch einem geringen Energiebedarf. Des Weiteren werden Beschädigungen einer außen am Rohr aufgebrachten Beschichtung, beispielsweise einer Lackierung, Isolierung und/oder Kunstharzverstärkung, Prinzip bedingt vermieden.A device mentioned at the beginning is from DE 10 2008 060 897 known. Here a bending device is provided which, at least with its parts that are essential for the function of the bending machine, can be positioned completely in the interior of the pipe to be bent. This makes it possible for the bending device to apply the forces required to bend the pipe from the inside onto the pipe. This makes it possible, on the one hand, to dispense with a mandrel and / or mandrel, since the bending device itself simultaneously supports the inner shape of the pipe and creates the bend in the pipe. This leads to a low workload and also a low energy requirement. Furthermore, damage to the outside of the pipe applied coating, for example a paint, insulation and / or synthetic resin reinforcement, principle avoided.

Aus der JP 58138523 A ist ebenfalls eine Biegevorrichtung bekannt, die im Inneren Der Rohrleitung die Biegung durchführt. Bei ihr sind 2 aktive Arbeitsbereiche vorhanden (vorne und hinten) wohingegen der mittlere Arbeitsbereich passiv ausgeführt ist. Hier ist die genaue Krafteinleitung auf beide separaten Arbeitsbereiche nachteilig.From the JP 58138523 A a bending device is also known which carries out the bend inside the pipeline. It has 2 active work areas (front and rear) whereas the middle work area is passive. The exact application of force to both separate work areas is disadvantageous here.

Günstig ist es, was auch für die nachfolgende erfindungsgemäße Lösung gilt, dass an dem Träger der Biegevorrichtung zumindest drei Kontaktelemente vorgesehen sind, wobei zwei Kontaktelemente auf einer ersten Seite des Trägers an den Enden des Trägers und ein Kontaktelement auf einer der ersten Seite gegenüberliegenden zweiten Seite des Trägers in der Mitte des Trägers angeordnet sind. Hierdurch ist es möglich, dass die Biegevorrichtung wie eine Wippe innerhalb des Rohres beweglich ist. Darüber hinaus ist es günstig, dass die Kontaktelemente an der inneren Oberfläche des Rohrs insbesondere formschlüssig anlegbar sind. Hierdurch ist es möglich, dass sich die Biegevorrichtung bei der Einleitung der zum Biegen notwendigen Kräfte in das Rohr der inneren Oberfläche des Rohres anpasst und so eine Beschädigung des Rohres vermieden wird. Die Kontaktelemente bestehen auch gemäß einer Lehre der Erfindung aus einer Gummiart, Hartholz, einer Aluminiumlegierung und/oder einem Kunststoff mit angemessener Shore-Härte.It is favorable, which also applies to the following solution according to the invention, that at least three contact elements are provided on the carrier of the bending device, two contact elements on a first side of the carrier at the ends of the carrier and one contact element on a second side opposite the first side of the carrier are arranged in the middle of the carrier. This makes it possible for the bending device to be movable like a rocker inside the pipe. In addition, it is favorable that the contact elements can be placed on the inner surface of the tube, in particular in a form-fitting manner. This makes it possible for the bending device to adapt to the inner surface of the pipe when the forces necessary for bending are introduced into the pipe, thus avoiding damage to the pipe. According to a teaching of the invention, the contact elements also consist of a type of rubber, hardwood, an aluminum alloy and / or a plastic with an appropriate Shore hardness.

Diese Vorrichtung ist verbesserungswürdig hinsichtlich der Biegegenauigkeit insbesondere im Bezug auf beschichtete Rohre.This device is in need of improvement with regard to the bending accuracy, especially with regard to coated pipes.

Der Erfindung liegt die Aufgabe zu Grunde, eine Biegevorrichtung zu schaffen, mit der beschichtete Rohr mit einer höheren Genauigkeit gebogen werden können.The invention is based on the object of creating a bending device with which the coated pipe can be bent with greater accuracy.

Dies wird durch eine Vorrichtung gemäß Anspruch 1 gelöst.This is achieved by a device according to claim 1.

Ausführungsmöglichkeiten werden durch die abhängigen Ansprüche definiert.Implementation options are defined by the dependent claims.

Nachfolgend wird die Erfindung anhand mehrerer Ausführungsbeispiele anhand einer Zeichnung näher erläutert. Dabei zeigen

Fig. 1
eine räumliche Darstellung einer ersten Ausführungsform einer erfindungsgemäßen Vorrichtung,
Fig. 2
eine alternative Ansicht zu Fig. 1,
Fig. 3
eine teilgeschnittene Ansicht zu Fig. 1,
Fig. 4
eine in Längsrichtung geschnittene Ansicht zu Fig. 1,
Fig. 5
eine Detailansicht des vorderen Fahrwerks zu Fig. 1
Fig. 6
eine räumliche Darstellung einer zweiten Ausführungsform einer erfindungsgemäßen Vorrichtung,
Fig. 7
eine Detailansicht zu Fig. 6 mit ausgefahrenem Kontaktelement,
Fig. 8
eine in Längsrichtung geschnittene Ansicht zu Fig. 6,
Fig. 9
eine Detailansicht des vorderen Fahrwerks zu Fig. 6,
Fig. 10
ein Biegevorgang mit einer Vorrichtung gemäß Fig. 6,
Fig. 11
eine räumliche Darstellung einer dritten Ausführungsform einer erfindungsgemäßen Vorrichtung, und
Fig. 12
eine in Längsrichtung geschnittene Ansicht zu Fig. 11.
The invention is explained in more detail below with the aid of several exemplary embodiments with the aid of a drawing. Show it
Fig. 1
a spatial representation of a first embodiment of a device according to the invention,
Fig. 2
an alternate view to Fig. 1 ,
Fig. 3
a partially cut view too Fig. 1 ,
Fig. 4
a view cut in the longitudinal direction Fig. 1 ,
Fig. 5
a detailed view of the front landing gear Fig. 1
Fig. 6
a spatial representation of a second embodiment of a device according to the invention,
Fig. 7
a detailed view too Fig. 6 with extended contact element,
Fig. 8
a view cut in the longitudinal direction Fig. 6 ,
Fig. 9
a detailed view of the front landing gear Fig. 6 ,
Fig. 10
a bending process with a device according to Fig. 6 ,
Fig. 11
a spatial representation of a third embodiment of a device according to the invention, and
Fig. 12
a view cut in the longitudinal direction Fig. 11 .

Fig. 1 bis 5 zeigen eine erste nicht erfindungsgemäße Ausführungsform einer Biegevorrichtung 10. Die Biegevorrichtung 10 weist einen Grundkörper 11 auf, an dessen vorderen und hinteren Ende jeweils ein Fahrwerk 12 angeordnet ist. An der Oberseite 16 des Grundkörpers 11 sind zwei Kontaktelemente 13, 14 vorgesehen. Die Unterseite 17 des Grundkörpers 11 weist eine Biegung 18 auf. An der Unterseite 17 ist mittig ein Kontaktelement 15 vorgesehen. Das Kontaktelement 13 ist beweglich in Bewegungsrichtung A aufgeführt. Um diese Bewegung durchführen zu können, weist das Kontaktelement einen Ausleger 19 auf, der das Kontaktelement 13 über einen Drehpunkt 20 mit dem Grundkörper 11 verbindet. Der Ausleger 19 ist über einen zweiten Drehpunkt 21 verbunden. Unterhalb des Kontaktelements 13 ist ein Wegumleitungselement 22 vorgesehen, das mit einem Krafteinleitungselement 23 verbunden ist. Bei dem Krafteinleitungselement 23 handelt es sich um einen Hydraulikzylinder. Der Hydraulikzylinder 23 weist eine Kolbenstange 24 auf. Dieser ist an ihrer vom Zylinderraum 25 abgewandten Seite über eine Stiftverbindung 26 mit einem Keil 27 verbunden. Der Keil 27 weist eine Keilfläche 28 auf, auf der ein zweiter Keil 29 bewegbar angeordnet ist. Der Keil 29 ist drehbar mit einem Träger 30 verbunden, auf dem das Kontaktelement 13 angeordnet ist. Im Innenraum des Grundkörpers 11 ist eine Basis 32 angeordnet. Der Hydraulikzylinders 23 weist ein unteres Zylinderauge 33 auf. Dieses ist über eine Stiftverbindung 34 mit dem Grundkörper 11 verbunden. Das Zylinderauge 33 weist eine Außenfläche 35 auf. Die Basis 32 weist eine korrespondierende Innenfläche 36 auf. Zwischen der Stiftverbindung 34 und dem Zylinderauge 33 besteht Spiel, dass, wenn der Hydraulikzylinder 23 ausgefahren wird, die Kraft auf der dem Kontaktzylinder 13 abgewandten Seite des Hydraulikzylinders 23 über die Außenfläche 35 auf die Innenfläche 36 der Basis 32 übertragen wird. Das Kontaktelement 14 und das Kontaktelement 15 sind jeweils fest, aber wechselbar, am Grundkörper 11 angeordnet. Figs. 1 to 5 show a first embodiment, not according to the invention, of a bending device 10. The bending device 10 has a base body 11, at the front and rear ends of which a chassis 12 is arranged. Two contact elements 13, 14 are provided on the upper side 16 of the base body 11. The underside 17 of the base body 11 has a bend 18. A contact element 15 is provided centrally on the underside 17. The contact element 13 is designed to be movable in the direction of movement A. In order to be able to carry out this movement, the contact element has a bracket 19 which connects the contact element 13 to the base body 11 via a pivot point 20. The boom 19 is connected via a second pivot point 21. Provided below the contact element 13 is a routing element 22 which is connected to a force introduction element 23. The force introduction element 23 is a hydraulic cylinder. The hydraulic cylinder 23 has a piston rod 24. This is connected to a wedge 27 on its side facing away from the cylinder chamber 25 via a pin connection 26. The wedge 27 has a wedge surface 28 on which a second wedge 29 is movably arranged. The wedge 29 is rotatably connected to a carrier 30, on which the contact element 13 is arranged. A base 32 is arranged in the interior of the base body 11. The hydraulic cylinder 23 has a lower cylinder eye 33. This is connected to the base body 11 via a pin connection 34. The cylinder eye 33 has an outer surface 35. The base 32 has a corresponding inner surface 36. There is play between the pin connection 34 and the cylinder eye 33 so that when the hydraulic cylinder 23 is extended, the force on the side of the hydraulic cylinder 23 facing away from the contact cylinder 13 is transmitted via the outer surface 35 to the inner surface 36 of the base 32. The contact element 14 and the contact element 15 are each fixed, but exchangeable, arranged on the base body 11.

Das Fahrwerk 12 ist in dieser Ausführungsform wie folgt ausgeführt. An der Stirnfläche 37 des Grundkörpers 11 ist ein Aufnahmeelement 38 angeordnet. An dem Aufnahmeelement 38 ist ein Schwenkelement 39 drehbar gelagert. An dem Schwenkelement 39 ist ein Pendelelement 40 drehbar angeordnet. Innerhalb des Pendelelements 40 ist ein Hydraulikmotor 41 angeordnet, der über Antriebsritzel 42 mit einer Antriebswelle 43 verbunden ist. Die Antriebswelle 43 ist mit den Antriebsrädern 44 in Verbindung. Über die Antriebsräder 44 wird die Biegevorrichtung 10 in das Rohr ein- und ausgefahren. Über die Schwenkelement 39 ist es möglich, das Fahrwerk 12 anzuheben, so dass das Kontaktelement 15 mit der Innenwand 102 des Rohres 100 in Berührung kommt und die Antriebsräder 44 sich von der Innenwand 102 des Rohres 100 lösen.The chassis 12 is designed as follows in this embodiment. A receiving element 38 is arranged on the end face 37 of the base body 11. A pivot element 39 is rotatably mounted on the receiving element 38. A pendulum element 40 is rotatably arranged on the pivot element 39. A hydraulic motor 41, which is connected to a drive shaft 43 via a drive pinion 42, is arranged inside the pendulum element 40. The drive shaft 43 is connected to the drive wheels 44. The bending device 10 is moved into and out of the pipe via the drive wheels 44. Using the pivot element 39, it is possible to raise the chassis 12 so that the contact element 15 comes into contact with the inner wall 102 of the pipe 100 and the drive wheels 44 detach from the inner wall 102 of the pipe 100.

Die Figuren 6 bis 9 zeigen eine zweite nicht erfindungsgemäße Ausführungsform der Biegevorrichtung 10. Am Grundkörper 11 ist am vorderen und hinteren Ende jeweils ein Fahrwerk 12 angeordnet. An der Oberseite 16 befinden sich jeweils am vorderen und hinteren Ende ein Kontaktelement 13 und ein Kontaktelement 14. An der Unterseite 17 ist mittig ein Kontaktelement 15 fest angeordnet. Im vorderen Abschnitt des Fahrwerks 12 weist die Unterseite 17 eine Biegung 18 auf. Das vordere Kontaktelement 13 und das hintere Kontaktelement 14 sind über zwei Seile 45 als Wegbegrenzer und Führung miteinander verbunden. Der Aufbau des Wegumleitungselements 22 und des Krafteinleitungselements 23 entspricht der ersten Ausführungsform. Wie in Fig. 7 dargestellt ist, ist das Kontaktelement 13 über Federelemente 46 zusätzlich mit dem Grundkörper 11 verbunden. Die Federelemente 46 dienen dazu, das Kontaktelement 13 wieder in seiner Ausgangsposition zu befördern, wenn der Hydraulikzylinder 23 eingefahren wird. Das vordere Fahrwerk 12 weist eine Achse 47 auf, die in Längsrichtung des Grundkörpers 11 auf der Stirnfläche 37 des Grundkörpers 11 angeordnet ist. Um die Achse 47, drehbar gelagert, ist eine Hülse 48 angeordnet. Fest an der Hülse 48 ist ein Trägerelement 49 angeordnet. Am Trägerelement 49 ist über Ausleger 51 ein Pendelelement 50 angeordnet. Das Pendelelement 50 weist eine Aufnahme 52 für Räder 53 auf. Über Hydraulikzylinder 54, die mit dem Trägerelement 49 und dem Pendelelement 50 verbunden sind, ist es möglich, die Pendelelemente 50 anzuheben, so dass die Räder 53 von der Innenwand des Rohres wegbewegt werden, wodurch das untere Kontaktelement 15 auf der Innenwand des Rohres zum Liegen kommt. Um hinreichend Biegeraum zu haben, werden die Pendelelemente 50 über die Hydraulikzylinder 54 soweit angehoben, so dass ein hinreichender Abstand zwischen Fahrwerk 12 und Rohrinnenwand 102 entsteht, so dass das Rohr 100 entsprechend um den gewünschten Biegewinkel nach oben gebogen werden kann.The Figures 6 to 9 show a second embodiment of the bending device 10 not according to the invention. A chassis 12 is arranged on the base body 11 at the front and rear ends. A contact element 13 and a contact element 14 are located on the front and rear ends of the top 16, respectively. A contact element 15 is fixedly arranged in the center of the bottom 17. In the front section of the chassis 12, the underside 17 has a bend 18. The front contact element 13 and the rear contact element 14 are connected to one another via two cables 45 as travel limiters and guides. The structure of the route diversion element 22 and the force introduction element 23 corresponds to the first embodiment. As in Fig. 7 is shown, is that Contact element 13 is additionally connected to base body 11 via spring elements 46. The spring elements 46 serve to move the contact element 13 back into its starting position when the hydraulic cylinder 23 is retracted. The front chassis 12 has an axis 47 which is arranged in the longitudinal direction of the base body 11 on the end face 37 of the base body 11. A sleeve 48 is arranged around the axis 47, rotatably mounted. A carrier element 49 is arranged fixedly on the sleeve 48. A pendulum element 50 is arranged on the carrier element 49 via arm 51. The pendulum element 50 has a receptacle 52 for wheels 53. Via hydraulic cylinders 54, which are connected to the carrier element 49 and the pendulum element 50, it is possible to lift the pendulum elements 50 so that the wheels 53 are moved away from the inner wall of the pipe, whereby the lower contact element 15 lies on the inner wall of the pipe comes. In order to have sufficient bending space, the pendulum elements 50 are raised by the hydraulic cylinders 54 so that a sufficient distance is created between the chassis 12 and the inner pipe wall 102 so that the pipe 100 can be bent upwards by the desired bending angle.

In Fig. 10 ist der Einsatz der Biegevorgang 10 gemäß zweiter Ausführungsform beim Biegen eines Rohres 100 gezeigt. Das Rohr 100 setzt sich zusammen aus einem Pipelinerohr 103 und einer Beschichtung 101 beispielsweise aus PUR-Hartschaum. Die Biegevorrichtung 10 ist ins Rohr 100 eingefahren. Dargestellt ist ein bereits gebogener Bereich 104 der Rohrleitung 100. Das Fahrwerk 12 der Biegevorrichtung 10 ist eingefahren, so dass das Kontaktelement 15 mit der Innenwand 102 des Pipelinerohrs 103 in Berührung ist. das Kontaktelement 13 wird über den Hydraulikzylinder 23 und das Wegumleitungselement 22 ausgefahren, in dem der Keil 27 von der Kolbenstange 24 des Hydraulikzylinders beweget wird und dabei der Keil 29 auf der Keilfläche 28 des Keils 27 nach oben bewegt wird, bis das Kontaktelement 13 mit der Innenwand 102 in Berührung kommt. Durch Fortsetzen des Bewegens der Kolbenstange 24 wird anschließend das Kontaktelement 13 gegen die Innenwand 102 des Rohres 100 gedrückt und das Pipelinerohr 103 des Rohres 100 erfährt eine Biegung. Um diese Biegung dauerhaft zu gestalten, muss zuerst die elastische Verformung des Rohres überwunden werden. Anschließend findet eine plastische Verformung des Rohres statt, so dass eine entsprechende Verformung durchgeführt wird. Nach Beendigung des Biegeschrittes, wenn der entsprechende Biegewinkel erreicht wurde, wird die Kolbenstange 24 über den Hydraulikzylinder eingefahren, wodurch sich der Keil 29 aus der Keilfläche 28 nach unten bewegen kann. Da die Kontaktfläche 13 über die Seile 45 an einer anderen Bewegung als zurück in den Grundkörper 11 hinein gehindert wird, wird das Kontaktelement 13 über die Federelemente 46 wieder in seine Grundstellung gebracht. Der elastische Anteil des Biegevorgangs wird erfasst und bei der Steuerung des Biegens zur Genauigkeit berücksichtigt.In Fig. 10 the use of the bending process 10 according to the second embodiment when bending a pipe 100 is shown. The pipe 100 is composed of a pipeline pipe 103 and a coating 101, for example made of rigid PUR foam. The bending device 10 has moved into the pipe 100. An already bent region 104 of the pipeline 100 is shown. The chassis 12 of the bending device 10 is retracted so that the contact element 15 is in contact with the inner wall 102 of the pipeline pipe 103. the contact element 13 is extended via the hydraulic cylinder 23 and the routing element 22, in which the wedge 27 is moved by the piston rod 24 of the hydraulic cylinder and the wedge 29 is moved upwards on the wedge surface 28 of the wedge 27 until the contact element 13 with the Inner wall 102 comes into contact. By continuing to move the piston rod 24, the contact element 13 is then pressed against the inner wall 102 of the pipe 100 and the pipeline pipe 103 of the pipe 100 undergoes a bend. To make this bend permanent, the elastic deformation of the pipe must first be overcome. Then there is a plastic deformation of the Pipe instead, so that a corresponding deformation is carried out. After completion of the bending step, when the corresponding bending angle has been reached, the piston rod 24 is retracted via the hydraulic cylinder, whereby the wedge 29 can move downwards out of the wedge surface 28. Since the contact surface 13 is prevented from moving other than back into the base body 11 via the cables 45, the contact element 13 is brought back into its basic position via the spring elements 46. The elastic component of the bending process is recorded and taken into account when controlling the bending for accuracy.

Anschließend wird das Fahrwerk 12 wieder ausgefahren und die Biegevorrichtung 10 kann aus dem Rohr hinaus bewegt werden bis zum nächsten Biegeort, in dem dann das nächste Biegeinkrement entsprechend durchgeführt werden kann.The chassis 12 is then extended again and the bending device 10 can be moved out of the pipe to the next bending location, in which the next bending increment can then be carried out accordingly.

Eine Ausführungsform einer erfindungsgemäßen Biegevorrichtung 10 ist in den Figuren 11 und 12 dargestellt. Am Grundkörper 11 sind auf beiden Seiten Fahrwerke 12 angeordnet, die einen Aufbau des Fahrwerkteils 12 der zweiten Ausführungsform, der sich im Bereich des Kontaktelements 13 befindet, aufweisen. Das Kontaktelement 13 ist wiederum über ein entsprechendes Wegumleitungselement 22 und ein Krafteinleitungselement 23 bewegbar angeordnet. Zwischen dem Kontaktelement 13 und dem Grundkörper 11 sind Führungsausleger 55 angeordnet. Das untere Kontaktelement 15 erstreckt sich entlang eines geraden Abschnitts des Grundkörpers 11 vom Beginn des gebogen ausgeführten Abschnitts des Grundkörpers 11 hin zu dem Ende des Grundkörpers 11, an dem das Kontaktelement 14 angeordnet ist. Das Kontaktelement 15 ist dabei fest an der Unterseite 17 über die gesamte Länge des geraden Abschnitts angeordnet. In dieser Ausführungsform ist das Kontaktelement 14 in Bewegungsrichtung C vom Grundkörper 11 weg bewegbar. Hierfür vorgesehen ist ein Hydraulikzylinder 56, der mit einem Schiebeelement 57 verbunden ist, auf dem Keile 58 angeordnet sind. Das Kontaktelement 14 ist auf einem Trägerelement 59 angeordnet. An der Unterseite des Trägerelements 59 sind Keile 60 angeordnet, die auf einer Keilfläche 61 der Keile 58 verschiebbar angeordnet sind. Wird der Hydraulikzylinder 56 ausgefahren, werden die Keile 58 gegenüber den Keilen 60 bewegt, so dass die Keile 60 auf den Keilflächen 61 in Bewegungsrichtung C verschoben werden, so dass das Kontaktelement 14 gegen die Innenwand 102 des Rohres 100 bewegt wird. Das Rausfahren des Kontaktelements 14 erfolgt so lange, bis eine Berührung mit der Innenwand 102 erfolgt. Dadurch wird das Ende der Biegevorrichtung 10, das zum noch nicht gebogenen Teil des Rohres 100 zeigt, innerhalb des Pipelinerohrs 103 verkeilt und dadurch arretiert. Anschließend wird das Kontaktelement 13 über den Hydraulikzylinder 23 und das Wegumleitungselement 22 in Bewegungsrichtung A ausgefahren bis das Kontaktelement 13 an der Innenwand 102 der Pipelinerohrs 103 anlangt und dieses berührt. Anschließend wird wie zuvor beschrieben, die Biegung des Rohres durchgeführt. Bezugszeichenliste 10 Biegevorrichtung 38 Aufnahmeelement 11 Grundkörper 39 Schwenkelement 12 Fahrwerk 40 Pendelelement 13 Kontaktelement 41 Hydraulikmotor 14 Kontaktelement 42 Antriebsritzel 15 Kontaktelement 43 Antriebswelle 16 Oberseite 44 Antriebsrad 17 Unterseite 45 Seil 18 Biegung 46 Federelement 19 Ausleger 47 Achse 20 Drehpunkt 48 Hülse 21 Drehpunkt 49 Trägerelement 22 Wegumleitungselement 50 Pendelelement 23 Krafteinleitungselement / Hydraulikzylinder 51 Ausleger 52 Aufnahme 24 Kolbenstange 53 Rad 25 Zylinderraum 54 Hydraulikzylinder 26 Stiftverbindung 55 Führungsausleger 27 Keil 56 Hydraulikzylinder 28 Keilfläche 57 Schiebeelement 29 Keil 58 Keil 30 Träger 59 Trägerelement 31 Innenraum 60 Keil 32 Basis 61 Keilfläche 33 Zylinderraum 34 Stiftverbindung 100 Rohr 35 Außenfläche 101 Beschichtung 36 Innenfläche 102 Innenwand 37 Stirnfläche 103 Pipelinerohr 104 gebogener Bereich A Bewegungsrichtung B Bewegungsrichtung C Bewegungsrichtung An embodiment of a bending device 10 according to the invention is shown in FIGS Figures 11 and 12 shown. On both sides of the base body 11, chassis 12 are arranged, which have a structure of the chassis part 12 of the second embodiment, which is located in the area of the contact element 13. The contact element 13 is in turn arranged movably via a corresponding path diversion element 22 and a force introduction element 23. Guide arms 55 are arranged between the contact element 13 and the base body 11. The lower contact element 15 extends along a straight section of the base body 11 from the beginning of the curved section of the base body 11 to the end of the base body 11 on which the contact element 14 is arranged. The contact element 15 is fixedly arranged on the underside 17 over the entire length of the straight section. In this embodiment, the contact element 14 can be moved away from the base body 11 in the direction of movement C. A hydraulic cylinder 56 is provided for this, which is connected to a sliding element 57 on which wedges 58 are arranged. The contact element 14 is arranged on a carrier element 59. Wedges 60 are arranged on the underside of the carrier element 59 and are arranged displaceably on a wedge surface 61 of the wedges 58. If the hydraulic cylinder 56 is extended, the wedges 58 are moved relative to the wedges 60, so that the wedges 60 are displaced on the wedge surfaces 61 in the direction of movement C, so that the contact element 14 is moved against the inner wall 102 of the pipe 100. The contact element 14 is extended until it comes into contact with the inner wall 102. As a result, the end of the bending device 10, which points to the not yet bent part of the pipe 100, is wedged within the pipeline pipe 103 and thereby locked. Then the contact element 13 is extended in the direction of movement A via the hydraulic cylinder 23 and the path diversion element 22 until the contact element 13 reaches the inner wall 102 of the pipeline pipe 103 and touches it. Then, as previously described, the tube is bent. List of reference symbols 10 Bending device 38 Receiving element 11 Base body 39 Swivel element 12 landing gear 40 Pendulum element 13 Contact element 41 Hydraulic motor 14th Contact element 42 Drive pinion 15th Contact element 43 drive shaft 16 Top 44 drive wheel 17th bottom 45 rope 18th Bend 46 Spring element 19th boom 47 axis 20th pivot point 48 Sleeve 21st pivot point 49 Support element 22nd Route diversion element 50 Pendulum element 23 Force application element / hydraulic cylinder 51 boom 52 admission 24 Piston rod 53 wheel 25th Cylinder space 54 Hydraulic cylinder 26th Pin connection 55 Guide boom 27 wedge 56 Hydraulic cylinder 28 Wedge surface 57 Sliding element 29 wedge 58 wedge 30th carrier 59 Support element 31 inner space 60 wedge 32 Base 61 Wedge surface 33 Cylinder space 34 Pin connection 100 pipe 35 Exterior surface 101 Coating 36 Inner surface 102 Inner wall 37 Face 103 Pipeline pipe 104 curved area A. Direction of movement B. Direction of movement C. Direction of movement

Claims (9)

  1. Device for bending pipes, in particular coated pipes (100), preferably pipes which are insulated and/or coated with PU-foam/rigid PUR foam, for pipelines having a basic body (11) which can be positioned in the pipe, on which basic body a chassis (12) for driving in the pipe (100) is provided and at least three contact elements (13, 14, 15) for creating a contact with an inner wall (102) of the pipe (100) for introducing a bending force, wherein at least a first and a second contact element (13, 14) are provided on one side (16) of the basic body (11), in each case at the ends of the basic body (11), and at least one third contact element (15) is arranged on the opposite side (17) of the basic body (11), and wherein at least one first of the contact elements (13, 14, 15) is provided movable, with respect to the basic body (11) via a force introducing element (23) for introducing the bending force, in the direction (A) of the inner wall (102) of the pipe (100), characterised in that the at least one second contact element (14) is provided movable, with respect to the basic body (11) via a further force introducing element (56), separately from the moving of the first contact element (13), in the direction (C) of the inner wall (102) of the pipe (100), and that on the opposite side (17) to the second contact element (14) a further contact element (15) is provided on the basic body (11).
  2. Device according to claim 1, characterised in that the contact element (15) situated opposite to the second movable contact element (14) is designed integrally with the oppositely-situated third contact element (15), wherein the contact element (15) situated opposite to the second movable contact element (14) extends preferably until the end of the basic body (11) on which the second contact element (14) is arranged.
  3. Device according to claim 1 or 2, characterised in that the force introducing element (23) is arranged substantially horizontal, such that a horizontal force introduction results, and that on one end of the force introducing element is provided at least one redirection element (22) which is designed such that the horizontally introduced force results a substantially vertical movement (A) of the contact element (13, 14, 15) towards the inner wall (102) of the pipe (100).
  4. Device according to any of claims 1 to 3, characterised in that the chassis (12) is arranged on the basic body (11) such that the basic body (11) is rotational with respect to the chassis (12) and that the direction of rotation takes place substantially at right angles with respect to the direction of travel.
  5. Device according to claim 3 or 4, characterised in that the redirection element (22) has a wedge-shaped element (27) and an element (29), on the movable contact element (13, 14, 15), corresponding to the wedge-shaped element (27), which is arranged movably on the wedge-shaped element (27).
  6. Device according to any of claims 1 to 5, characterised in that the movable contact element (13, 14, 15) is connected movably with the basic body (11) via a connecting element, preferably a cantilever (19) or a steel rope (45), which is rotationally articulated on the contact element (13, 14, 15), and preferably the connecting element (19, 45) is articulated rotatably on the basic body (11), and/or that at least one returning element (46), preferably a spring element, is provided between movable contact element (13, 14, 15) and basic body (11).
  7. Device according to any of claims 3 to 6, characterised in that on a side of the force introducing element (23) situated opposite to the redirection element (22) in each case on the force introducing element (23) and correspondingly on the basic body (11) is present in each case one pressing surface (35, 36) as abutments to the force introduction, which touch one another in the case of the introduction of force, and/or that the force introducing element (23) is a hydraulic cylinder.
  8. Device according to any of claims 1 to 7, characterised in that the chassis (12) has a chassis basic body (40, 48) which is rotational with respect to the basic body (11), and/ or that the chassis (12) has a front and a rear chassis and the rotational axes of the chassis bodies of the [plural] chassis (12) extend coaxially, wherein preferably the rotational axis is arranged such that it is located above the centre of gravity of the device and/or of the chassis (12).
  9. Device according to any of claims 1 to 8, characterised in that the chassis (12) has a driving body (40, 50) which has wheels (44, 53) for advancing the device (10) in the pipe (100) and which is movable with respect to the chassis basic body (40, 48) to the rotational axis of the chassis basic body, preferably via at least one hydraulic cylinder.
EP13729265.2A 2012-06-20 2013-06-14 Device for bending pipes for pipelines Active EP2864068B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012012139.3A DE102012012139B4 (en) 2012-06-20 2012-06-20 Apparatus and method for bending pipes for pipelines
PCT/EP2013/001762 WO2013189582A1 (en) 2012-06-20 2013-06-14 Device and method for bending pipes for pipelines

Publications (2)

Publication Number Publication Date
EP2864068A1 EP2864068A1 (en) 2015-04-29
EP2864068B1 true EP2864068B1 (en) 2020-11-04

Family

ID=48628609

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13729265.2A Active EP2864068B1 (en) 2012-06-20 2013-06-14 Device for bending pipes for pipelines

Country Status (6)

Country Link
US (1) US10441987B2 (en)
EP (1) EP2864068B1 (en)
CA (1) CA2883031C (en)
DE (1) DE102012012139B4 (en)
RU (1) RU2617464C2 (en)
WO (1) WO2013189582A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107214221B (en) * 2017-07-04 2023-07-28 中石化石油工程技术服务有限公司 Internal pipe bending machine and pipe bending method
DE102021121057A1 (en) 2021-08-12 2023-02-16 Bendforce GmbH Device and method for internal bending of tubes for pipelines
CN115648597B (en) * 2022-12-20 2024-03-26 南通沿江管业有限公司 Pipeline construction bending device

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US3834210A (en) 1972-06-06 1974-09-10 Crc Crose Int Inc Pipe bending system
US4007622A (en) * 1975-05-01 1977-02-15 Abram Isaevich Galperin Device for bending thin-walled pipes
DE2749589A1 (en) * 1977-11-05 1979-05-10 Schwarze Rigobert COLD BENDING PROCESS AND DEVICE FOR THE MANUFACTURE OF CURVED CASED PIPELINES
US4352285A (en) * 1979-09-06 1982-10-05 Crutcher Resources Corporation Hydraulic wedge mandrel
JPS58138523A (en) * 1982-02-15 1983-08-17 Nippon Steel Corp Bend-working method of metallic pipe
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US5327765A (en) * 1993-04-05 1994-07-12 Aluminum Company Of America Internal articulated mandrel for the stretch forming of elongated hollow metal sections
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JP4751049B2 (en) * 2003-12-26 2011-08-17 カルソニックカンセイ株式会社 Bending part manufacturing apparatus and bending part manufacturing method of multi-hole tube.
DE102008060897A1 (en) 2008-12-09 2010-06-10 Compaß, Eberhard, Dr. Device for bending large diameter pipe of pipelines that transport large amount of e.g. oil, has three contact elements for producing bends in pipe, where bending device is positionable in interior of pipe
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Also Published As

Publication number Publication date
US20150266075A1 (en) 2015-09-24
DE102012012139A1 (en) 2013-12-24
DE102012012139B4 (en) 2014-12-24
WO2013189582A1 (en) 2013-12-27
CA2883031C (en) 2019-01-08
EP2864068A1 (en) 2015-04-29
US10441987B2 (en) 2019-10-15
CA2883031A1 (en) 2013-12-27
RU2617464C2 (en) 2017-04-25
RU2015101329A (en) 2016-08-10

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