WO2023017129A1 - Vorrichtung zum innenbiegen von rohren für rohrleitungen - Google Patents
Vorrichtung zum innenbiegen von rohren für rohrleitungen Download PDFInfo
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- WO2023017129A1 WO2023017129A1 PCT/EP2022/072586 EP2022072586W WO2023017129A1 WO 2023017129 A1 WO2023017129 A1 WO 2023017129A1 EP 2022072586 W EP2022072586 W EP 2022072586W WO 2023017129 A1 WO2023017129 A1 WO 2023017129A1
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- WO
- WIPO (PCT)
- Prior art keywords
- base body
- tool
- bending
- tube
- tool element
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Ceased
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Classifications
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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
- 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 the internal bending of pipes, in particular coated pipes, for pipelines with a base body that can be positioned in the pipe and has at least one bearing surface with an inner wall of a pipe to be bent on at least one side, preferably the underside, the base body having a Bearing surface opposite side, preferably the top side, on which at least one tool for introducing a bending force into the tube is movably provided, the tool being movable relative to the base body via at least one actuator for introducing the bending force.
- tubes are used in pipelines such as pipelines that carry large volumes of liquids or gases over long distances.
- the transported media include petroleum, chemicals and/or water.
- Other tubes made of different materials such as copper, stainless steel, brass, etc. can also be bent.
- the technology is particularly suitable for pipes with a wall thickness that is relatively small in relation to the diameter, as these are otherwise very difficult or impossible to bend.
- pipelines worldwide for conducting both liquid and gaseous substances over long distances are generally composed of sections of individual pipe ranging in length from 6 to 18 meters.
- the pipes typically range in diameter from 4 to well over 75 inches and are welded together into a pipeline on the surface, underground and/or in the water.
- the pipelines follow the general contour of the earth's surface.
- the course of the pipelines can, in particular, Its horizontal and vertical extent can also be diverted or guided around obstacles in some other way.
- a major challenge when planning and constructing such pipelines is to join the ends of the individual pipes with high-quality welded joints.
- changes in direction in the pipeline are necessary.
- Changes in direction in pipelines can be created by welding individual pipe sections with miter cuts, especially in the case of pipes with a large diameter.
- the change of direction in the pipe must be created by bending the pipe.
- the curved pipes enable significantly better flexibility on the construction site and significantly tighter radii when laying the route.
- a bend is achieved by performing numerous small, ordered bending steps in the tubing.
- the desired bending radius is thus created in the form of a polygon, even if this is ideally not recognizable on the finished bend.
- the operator has complete control over the number of incremental and/or incremental bends to be made, the spacing 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 bending machines to create precise bends in the tubes while minimizing the number of damaged or misbent 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 tube in the bending device and a movement of the bending device itself are possible. The latter variant has the disadvantage that the tube has to be realigned in the bending device. Moving the large-diameter pipes, precisely relocating the mandrel and controlling the bend created requires a great deal of manpower and energy.
- benders Due to the size of the tubes to be bent, benders are generally massive in nature and hydraulically operated.
- a bending device is generally known from US 3,834,210 and US 5,092,150. Such bending devices have devices for gripping the tube, moving the tube in the bender and creating the bend in the tube. These devices are all hydraulically operated under the control of an operator.
- the bender generally includes a reinforced frame to which the components are anchored against relative movement.
- the main components of the tube bender include a bending tool, 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 tube, the tube being pressed against the bending tool during the bending process.
- the support device is actuated by hydraulic pressure during the bending process and pivoted in the direction of the bending tool.
- the fastening shoe meanwhile fixes the pipe.
- Mandrel In the working areas of the bending device, forces are transmitted to the tube during the bending process by means of the bending tool, the support device and the fastening shoe, so that the tube is deformed.
- the mandrel is a flexible, linkage structure that allows the tube to be bent without changing the circular nature of the tube at the point of bending.
- Mandrels of this type are known in the prior art and are generally composed of spring steel slats.
- bending devices usually have three working areas in which the forces required to bend the tube are transmitted to the tube. During the bending process, an active application of force takes place in a work area using a hydraulic cylinder. The remaining passive working areas serve as abutments and are connected to the active working area via the frame.
- DE 696 03 499 T2 shows a bending device in which the middle of the three working areas is designed as an active working area.
- DE 600 28 484 T2 also discloses a method for automating a bending device and a controller with a programmable processor that reduces the amount of work involved.
- Automation is required to perform incremental and/or step-by-step bends with a high degree of repeatability and accuracy. With a higher quality, the duration of the entire bending process should be reduced and at the same time the transport weight and the energy requirement of the bending device should be reduced.
- a device mentioned at the outset and a corresponding method are known from DE 10 2008 060 897.
- a bending device is provided here, which can be positioned completely inside the tube to be bent, at least with its parts that are essential for the function of the bending machine. This makes it possible for the bending device to apply the forces necessary for bending the tube to the tube from the inside. This leads to a low workload and also a low energy requirement. Furthermore, damage to a coating applied to the outside of the pipe, for example a paint finish, thermal insulation and/or synthetic resin reinforcement, is in principle avoided.
- JP S58138523 A also discloses a bending device that performs the bend inside the pipeline. It has two active working areas (front and rear), while the middle working area is passive. The precise application of force to both separate work areas is disadvantageous here.
- DE 10 2012 012 139 A1 discloses an internal pipe bending device in which at least three contact elements are provided on a carrier, two contact elements on a first side of the carrier at the ends of the carrier and one contact element on a second side of the carrier opposite the first side in the Center of the carrier are arranged. This makes it possible for the bending device to be movable inside the tube like a seesaw.
- the invention is based on the object of creating a bending device with which pipes can be bent from the inside with significantly higher forces and at the same time with greater accuracy.
- the structure of the machines should be simplified in order to achieve the longest possible service life.
- the tool is provided as a tool element which has at least two bending force introduction sections for introducing the bending force into the tube, which can be moved relative to the base body by at least one actuator.
- the bending energy can be optimally introduced into the tube to be bent in a particularly simple and precise manner.
- a further teaching of the invention provides that the at least two bending force introduction sections are provided in the outer area of the tool element.
- a further teaching of the invention provides that the tool element has a contact section which is provided between two outer bending force introduction sections, preferably in the middle. This section is preferably connected to the two surrounding sections. In this way, the tube can be supported in a simple manner during bending in order to avoid unwanted changes in shape.
- the third contact section can be moved via one or more actuators, in particular in the radial direction.
- the supporting effect in the area of the plastic deformation of the tube can be metered in a particularly advantageous manner.
- a further teaching of the invention provides that the bending force introduction sections and/or contact sections are inherently elastically deformable and/or can expand. As a result, ovalization can be counteracted in a simple manner.
- a further teaching of the invention provides that at least one elastic section is provided between the at least two bending force introduction sections, and/or the central contact section is inherently elastic in the direction of the bending to be produced.
- the elastic section is provided by reducing the material in the tool element, preferably in the form of depressions in the tool element.
- a preferred embodiment of this is the provision of the elastic area in the form of ribs and recesses between the ribs.
- the ribs are particularly advantageously designed in such a way that they permit the necessary deformations and at the same time can absorb the necessary supporting forces.
- the ribs can also assume free forms that specifically allow the desired deformations. These are determined, for example, using a topology optimization on the computer.
- the at least one area with a reduction in material in the tool element is at least partially filled with an elastic material.
- the ribs and recesses mentioned in particular are preferably fully or partially included filled with an elastic material. When bending, the elastic material is compressed in the ribs and thereby pushed out of the ribs. This provides additional support for particularly thin-walled pipes.
- actuators are hydraulic cylinders or similar linear actuators such as pneumatic cylinders, threaded spindles and/or piezo elements.
- the force can be introduced directly into the tube in a particularly effective manner and without losses.
- a further teaching of the invention provides hydraulic cylinders with one or more pistons arranged one behind the other.
- the pistons can be accommodated in a common cylinder block or in several separate cylinder blocks and act on a common power transmission element. This element is either part of the upper tool element or transmits the force there and is rotatably mounted relative to the upper tool in order to avoid impermissible forces on the cylinder.
- a further teaching of the invention provides that the actuator moves the tool element away from the base body, preferably upwards, and in an arc from the base body towards the inner wall of the pipe. This ensures that there are no relative displacements between the tool and the pipe and between the actuator and the tool. Due to its elasticity, the tool precisely follows the course of the inner surface of the pipe and compresses itself to the same extent.
- a further teaching of the invention provides that the actuators move the outer bending force introduction sections of the tool element upwards and in an arc from the base body towards the inner wall of the tube. This ensures that there are no relative displacements between the bending force introduction sections and the pipe and between the actuator and the bending force introduction sections. Due to its elasticity, the tool precisely follows the course of the inner surface of the pipe and compresses itself to the same extent.
- the actuators and the bending force introduction sections of the tool element are arranged and designed in such a way that the outer bending force introduction sections of the tool part can be moved away from the base body, preferably upwards, and in an arc from the base body to the inner wall of the pipe with the actuators.
- the lower contact surface is curved. In this way, the optimal bending of the tube can be specified in a simple manner.
- a further teaching of the invention provides that a chassis for moving in the pipe is provided on the base body. This allows the bending device to be easily moved in the pipe.
- the running gear has at least two running gear elements, preferably with rollers, which are preferably located on the end faces and/or in front of and behind the lower contact element and can be retracted, preferably via spring elements. In this way, a safe method in the interior of the tube can be made possible in a simple manner.
- a further teaching of the invention provides that at least one running gear element is arranged in the area of the lower contact element and is arranged such that it can be moved into the main body by means of a spring force. It has been shown that this makes it possible to dispense with active raising/lowering in a simple manner.
- a further teaching of the invention provides at least one push rod and/or push chain for pushing and pulling the bending device into and out of the pipe to be bent/bent, which is attached to a base outside the pipe and is driven from there via a mechanism can. In this way, a movement of the bending device in the pipe can be provided in a simple manner.
- a further teaching of the invention provides that the position of the machine in the pipe can be detected via the push rod/push chain. In this way, an exact position control of the device in the pipe is possible in a simple manner.
- a further teaching of the invention provides that the push rod/push chain is held on a base outside of the tube in a torsionally rigid manner. As a result, twisting of the bending device in the tube can be largely prevented or at least detected.
- a further teaching of the invention provides at least one roller in the upper area of the base body and/or tool.
- This roller is not spring-loaded like the lower rollers, but protrudes above the tool geometry at an adjustable distance. After the first bending step, the roller (rollers) simply prevents this The tool element rests against the pipe as soon as the lower rollers press the machine upwards via spring force.
- a further teaching of the invention provides that at least one chassis element is pretensioned via at least one pretensioning element so that the base body and the tool are free in the air.
- the prestressing element is preferably a spring element, a pneumatic cylinder or an only partially filled hydraulic cylinder, in which case the prestressing is preferably adjustable. If the weight of the machine is exceeded, e.g. if the upper tool element rests in the pipe or if the upper roller rests after the tool element has been relieved, the pre-stressed spring system begins to sink. When the tube is bent, the lower rollers of the carriage and the upper roller(s) are in contact for the movement. If you drive through a straight pipe, the upper roller can touch.
- a further teaching of the invention provides that the tool element is essentially in full contact with the inner wall of the pipe to be bent with the at least two bending force introduction sections, preferably over the entire length of one side, preferably the upper side, of the tool element.
- a further teaching of the invention provides that at least one contact element and/or at least one bending force introduction section is covered with elements made of plastic, brass, aluminum or wood.
- a further teaching of the invention provides that the diameter of the tool element and/or the base body in the unloaded state is smaller than the inner diameter of the pipe, so that the device can be moved in the pipe.
- a further teaching of the invention provides that the tool is at least partially slotted in its longitudinal direction in order to enable a slight elastic expansion in the radial direction.
- a further teaching of the invention provides that the tool element extends at least on one side beyond an end face of the base body, so that there is at least one overhanging area.
- a further teaching of the invention provides that the base body and/or the tool element are constructed in two parts, preferably in the form of an inner base body and an outer base body and/or an inner tool element and an outer tool element.
- a further teaching of the invention provides that the outer base body and/or the outer tool element are provided in the form of a cover element, preferably made of plastic.
- a further teaching of the invention provides that the tool element is constructed in several parts, the tool element being constructed from at least two bending force introduction section parts and a contact section part, which is preferably designed to be elastic, which are connected to one another.
- the contact section part consists of at least two bars, that the bars are connected to the at least two bending force introduction section parts, and that at least two rib elements are arranged on the bars.
- the rib elements are formed in an arc shape and are each seated on one side of the beam.
- the connection is preferably made loose.
- the rib elements have a positive fit with the beam. This avoids severe deformation of the ribs and achieves better support in the pipe.
- the at least two rib elements are spaced apart so that there is an intermediate space. This allows the rib elements to move into the space and towards each other.
- At least one elastically deformable element is provided in the intermediate space. This can deform elastically when the ribs move into the distance, support the rib elements and/or move outwards in the manner of a bead, so that the pipe to be bent is supported.
- a further teaching of the invention provides that at least one actuator is provided in the area of the contact section part.
- one actuator is arranged centrally under each of the at least two beams.
- Figure 1 is a side view of a first embodiment of a bending device according to the invention in a tube to be bent
- Figure 2 is a spatial representation of Figure 1
- Figure 3 is a sectional view of the longitudinal axis of Figure 1,
- FIG. 4 shows a sectional view of a part of the first embodiment of the device according to the invention transversely to the longitudinal axis
- FIG. 5 shows a side view of a second embodiment of a bending device according to the invention with a chassis
- FIG. 6 shows a second side view of FIG. 5
- figure ? a side view of a third embodiment of a bending device according to the invention with chassis and push rod,
- Figure 8 is a spatial representation of Figure 7,
- FIG. 9 shows a three-dimensional representation of a guide for a push rod for FIGS. 7 and 8,
- Figure 10 is a side view of a fourth embodiment of one according to the invention.
- FIG. 11 is a spatial partial representation of FIG. 10,
- FIG. 12 shows a side view of a fifth embodiment of a bending device according to the invention with running gear, protruding bending tool and covers for the contact sections
- Figure 13 is a three-dimensional representation of Figure 12
- Figure 14 is a side view of a basic design without covers for the embodiment of Figure 13,
- Figure 15 is a three-dimensional representation of Figure 14,
- Figure 16 is a sectional view of the longitudinal axis of Figure 13
- Figure 17 is a side view of a sixth embodiment of one according to the invention
- FIG. 18 is a sectional view of part of the sixth embodiment of the device according to the invention, transverse to the longitudinal axis, and
- FIG. 19 shows a partial view of FIG. 17 in the bending state.
- FIG. 1 shows a first pipe bending device 10 according to the invention with a base body 11.
- the base body 11 has an underside 12 in this case.
- the underside 12 has a lower contact surface 13 in the middle.
- the underside 12 is preferably completely curved here. Alternatively, a partial arcuate design is also possible.
- the arc shape is provided in such a way that the radius is narrower than the final intended radius of a finished bent tube 100.
- the bend of the underside 12 is essentially convex.
- the shape of the contact surface 13 can be designed as a free form in order to achieve optimal roundness of the tube after bending.
- the base body 11 is preferably made in one piece.
- the base body can be divided in the longitudinal direction, e.g. to make the base body 11 easier to manufacture.
- the base body 11 has an upper side 14 which is preferably curved here with a maximum above the lower contact surface 13 .
- the upper side 14 has a concave shape on end faces 15 of the pipe bending device 10, as is shown in FIG.
- the base body 11 is preferably designed in such a way that it can absorb the highest possible forces and at the same time offers sufficient space for the necessary add-on parts and a tool element 21 .
- depressions 16 are provided, which are connected to a channel 17.
- actuators 18, here preferably hydraulic cylinders which can be extended upwards in the direction of the arrow A and retracted counter to the direction of the arrow A.
- further depressions 19 can be provided in the region of the lower contact surface 13 in the upper side 14 between the depressions 16, in which one or more further actuators 20, here preferably a hydraulic cylinder, is arranged. This can also be extended and retracted in the direction of arrow A.
- Connecting lines can be provided in the channel 17 between the actuators 18 for the energy supply and for the control.
- These are preferably hydraulic lines and valves as well as cables for sensors or electrically driven actuators and for any connection of lines of the running gear.
- a tool element 21 is arranged on the upper side 14 .
- This has an underside 22 which preferably corresponds to the upper side 14 of the base body 11 in such a way that it can be arranged on the upper side 14 of the base body 11 .
- the underside 22 of the tool element 21 has corresponding depressions 23 which are arranged above the depressions 16 .
- the underside 22 has a depression 24 which is arranged correspondingly above the depression 19 when the tool element 21 is arranged on the base body 11 .
- the depressions 23, 24 each have a contact surface 25, 26 against which a contact surface 36 of one of the actuators 18, 20 acts during its movement in the direction of arrow A and on which the actuator 18, 20 exerts a force in the direction of arrow A accordingly.
- the tool element 21 has an upper side 27 .
- the upper side 27 is preferably designed in such a way that it essentially corresponds to the inner radius of the tube 100 that is to be bent in the contact area with the inner wall 101 of the tube 100 .
- the radius can be smaller or the same size, so that the tube bending device 10 can be moved in and out of the tube.
- the radius can widen if necessary.
- the upper side 27 preferably has two outer bending force introduction sections 28 and a central contact section 29 .
- the outer bending force introduction sections 28 and the central contact section 29 are preferably separated from one another here by elastic deformation sections 30 .
- the tool element 21 preferably consists of a coherent part or a plurality of parts that are mechanically connected to one another.
- the tool element 21 is made elastic at least in the middle in order to follow the inner wall 101 of the tube 100 during bending.
- Several elastic deformation sections 30 can also be provided next to the center of the upper part in order to introduce a stronger/different force on the inner wall 101 of the tube 100.
- the force and position of the introduction of force from the tool element 21 to the tube 100 can be adjusted via the elasticity and original shape of the tool element 21 .
- the elastic deformation sections 30 preferably have ribs 31 and recesses 32 which extend in the circumferential direction on the upper side 27 of the tool element 21 .
- the recesses 32 have a width B.
- the recesses 32 are preferably designed with different depths depending on the elasticity of the deformation section 30 to be achieved. In FIG. 3, the recesses 32 become deeper as the distance from the central contact section 29 increases.
- the depth is preferably selected such that the distance between the deepest point 33 of the recess 32 and the underside 22 of the tool element 21 relative to the respective recess 32 is constant. Alternatively, the distances can be varied depending on the elasticity to be achieved.
- the actuators 18, 20 are extended in the direction of arrow A, the upper side 27 of the tool element 21 is first moved against the inner wall 101 of the tube 100 until the bending force introduction sections and the middle contact section 28, 29 and, if necessary, also the upper sides 34 of the ribs 31 on the inner wall 101 issue.
- the central contact section 29 serves to support the transformation of the tube 100 in order to prevent deformation of the tube away from the maintenance of the peripheral shape of the tube 100. It has been shown that it is advantageous if the central contact section 29 is also designed to be elastically deformable.
- an actuator 20 preferably a hydraulic cylinder
- an actuator 20 can be provided here, which can exert a force in the direction of arrow A via the central contact section 29 on the inner wall 101 of the tube 100 during bending .
- the supporting effect of the central area can optionally be regulated particularly precisely via the actuator 20, e.g. for very thin-walled pipes.
- the outer bending force introduction sections 28 and the middle contact section 29 can be designed as individual components. Between Bending force introduction sections 28 and/or the central contact section 29 can be provided with recesses/spacings.
- an articulated connection can also be provided between the sections 28, 29 in order to enable more precise guidance.
- the outer contact elements 28 exert a force on the inner wall 101 of the pipe 100 .
- the outer bending force introduction sections 28 move together with the tube 100 in the direction of arrow D until the arcuate underside 12 of the base body 11 comes into contact with the inner wall 101 of the tube 100 at its outer sections 35 .
- the tube 100 deforms both elastically and plastically.
- the outer bending force application sections 28 move in the opposite direction to the arrow D.
- the pipe 100 also moves in the opposite direction to the arrow D to reduce the elastic deformation until this has been reduced and only the plastic deformation of the pipe 100 remains . Meanwhile, the width B of the recesses 32 between the ribs 31 widens accordingly.
- the underside 22 of the tool element 21 here preferably rests completely on the upper side 14 of the base body 11 again. Then the tube bending device 10 is moved in the tube 100 to the next bending point and the process described above is repeated.
- Springs or similar return elements can be provided for returning the tool element 21 to its original position.
- elements for guiding can be provided, which hold the tool element 21 in position relative to the base body 11, but at the same time allow the elastic movements of the tool element 21 and the movements in the vertical direction.
- the contact surfaces 25, 26 of the depressions 23, 24 are designed in the form of a section of a cylinder or a section of a sphere. Furthermore, it is advantageous that the contact surfaces 36 of the actuators 18, 20 are also designed in the form of a section of a cylinder or a section of a sphere. It is advantageous if the shape of the contact surfaces 36 is flatter than the shape of the contact surfaces 25, 26. This is shown in FIG.
- FIG. 5 shows a second pipe bending device 10 according to the invention with an identical structure to the first embodiment according to the invention shown in FIGS.
- the second embodiment has a chassis.
- This comprises a chassis element 41 on each of the end faces 15 and rollers 42 attached to the upper side 14 of the base body 11. These are arranged on a carrier (not shown) and each extend through an opening 40 in the upper side 27 of the tool element 21.
- the chassis element 41 comprises a base body 43 which is connected to the end face 15 .
- the base body 43 is movably connected in the direction of the arrow F to a support element 44 .
- Rollers 45 are arranged on the support element 44, here preferably at an angle relative to the perpendicular bisector of the pipe bending device in accordance with the inner diameter of the pipe, the rollers 45 being arranged on the support element 44 via supports 46.
- the base body 43 is connected to the support element 44 via pretensioning elements 47 which are preferably spring elements 48 which are each arranged on a guide 49 .
- the spring elements can also be arranged independently of the guide.
- the rollers 45 rest on the inner wall 101 of the pipe when the pipe bending device 10 is being moved.
- the tool element 21 is pressed in the direction of the arrow A against the inner wall 101 of the pipe via the actuators 18 , 20 .
- the tool element 21 is moved past the rollers 42 in that they move through the openings 40 .
- the upper side 27 with the bending force introduction sections 28 reaches the upper inner wall 101 and is pressed against it.
- the prestressing element 47 is subjected to a counterforce, so that the carrying elements 44 move in relation to the base bodies 43 in the direction of the arrow F, with the spring elements 48 preferably being compressed here.
- the underside 12 is moved with the contact surface 13 in the direction of the pipe inner wall 101 until the contact surface 13 rests and the pipe bending process can begin as previously described. After completing the pipe bend, the procedure is reversed.
- FIGS. 7 to 9 show a third embodiment according to the invention of a pipe bending device 10 according to the invention with an identical structure to the first and second embodiment according to the invention shown in FIGS.
- a preferably torsionally rigid push rod 50 is provided, which is connected to an attachment element 51, for example on the end face 15 of the pipe bending device 10, for example via a joint 52.
- the connection is suitable for transmitting thrust and tensile forces, for example in the direction of the arrow G, which are generated by a drive (not shown) and transmitted via the push rod 50 in order to move the pipe bending device 10 in the pipe 100 in the direction of the arrow G.
- the push rod is provided here with a square cross-section, for example.
- Figure 9 shows a base element 53, here preferably provided with rollers 54 for driving, guiding and stabilizing the push rod 50.
- FIGS. 10 and 11 show a fourth embodiment according to the invention of a pipe bending device 10 according to the invention with an identical structure to the first and second embodiment according to the invention shown in FIGS.
- the features of the third embodiment can be added here, but are not shown.
- the tool element 21 is longer than the base body 11 so that there is an overhang area 60 that extends over the chassis elements 41 . This increases the bending area in a simple way, so that the surface pressure in the tube is reduced and the final desired overall bend can be achieved with fewer bending steps.
- FIGS. 12 to 16 show a fifth embodiment according to the invention of a pipe bending device 10 according to the invention with an identical structure to the first and fourth embodiment according to the invention shown in FIGS. 1 to 4 and 10, 11. Only the ribs 31 of the tool element 21 are flat here. The features of the second and third embodiment can be added here, but are not shown.
- the base body 11 and the tool element 21 are constructed in two parts. They each have an inner base body 11a and an outer base body 11b and an inner tool element 21a and an outer tool element 21b.
- Inner base body 11a and inner tool element 21a form the basic structure of pipe bending device 10 and are preferably made of steel.
- the base body 11a has a flat, non-curved underside 12 here, for example.
- a lower cover element 61 preferably made of plastic, is provided as an outer base body 11b on an underside 12a of the base body 11a and also contains the bearing surface 13 .
- an upper one Cover element 62 preferably made of plastic, is provided as the outer tool element 21b, the cover also having the bending force introduction sections 28.
- the covering elements 61 and 62 can also be designed as a continuous elastic plastic part.
- FIGS. A sixth embodiment of the device 10 according to the invention is shown in FIGS.
- the structure of the base body, including the actuators 18, 20, corresponds to the structure set out above.
- the tool element 21 has an upper side 27 .
- the upper side 27 is preferably designed in such a way that it essentially corresponds to the inner radius of the tube 100 that is to be bent in the contact area with the inner wall 101 of the tube 100 .
- the radius can be smaller or the same size, so that the tube bending device 10 can be moved in and out of the tube.
- the radius can widen if necessary.
- the upper side 27 preferably has two outer bending force introduction sections 28 and a central contact section 29 .
- the bending force introduction sections 28 and the central contact section 29 are designed as individual components 60, 61.
- the components 60 , 61 are preferably connected to one another via a connecting element 62 .
- This connection is particularly preferably made here via a non-positive and/or positive connection.
- the contact section element 61 is preferably constructed here from two bars 63 arranged in parallel.
- the beams can be made in one piece or in several parts. Shown here is the one-piece design. Furthermore, several bars can also be arranged one above the other.
- the beams 63 are preferably connected to the connecting element 62 .
- This connection is particularly preferably made here via a non-positive and/or positive connection.
- Rib elements 64 corresponding to the ribs 31 are arranged on the beams 63 . These are preferably designed in an arc shape. More preferably, the rib members 64 are loose on a top 65 of the beams 63 on. The ribs are preferably connected to the bar elements 63 in the radial direction by means of a form fit.
- a distance 66 is preferably provided between two rib elements, which correspond to the recesses 32 .
- An elastic element 67 is particularly preferably provided in this distance 66 .
- an actuator 20' preferably a hydraulic cylinder
- a hydraulic cylinder which exerts a force A via the central contact section 29 on the inner wall 101 of the tube 100 can exert during bending.
- the supporting effect of the central area can optionally be regulated particularly precisely via the actuator 20', e.g. for very thin-walled pipes.
- At least one actuator 20' is provided for this purpose below at least one bar 63.
- the beams 63 bend as shown in FIG.
- the rib elements 64 move towards one another and squeeze the elastic elements 67, which as a result each form a bead 68 on the outside.
- the bead 68 presses against the pipe 100 and additionally supports it.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
- Coating Apparatus (AREA)
Abstract
Description
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Priority Applications (7)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2024508790A JP7738942B2 (ja) | 2021-08-12 | 2022-08-11 | パイプライン用のパイプを内部曲げするための装置 |
| CN202280068083.0A CN118201724A (zh) | 2021-08-12 | 2022-08-11 | 用于将用于管道的管内部弯曲的设备 |
| EP22765456.3A EP4384334B1 (de) | 2021-08-12 | 2022-08-11 | Vorrichtung zum innenbiegen von rohren für rohrleitungen |
| MX2024001879A MX2024001879A (es) | 2021-08-12 | 2022-08-11 | Dispositivo para el doblamiento interno de tubos para tuberias. |
| US18/682,757 US12453998B2 (en) | 2021-08-12 | 2022-08-11 | Device for the internal bending of pipes for pipelines |
| CA3229118A CA3229118A1 (en) | 2021-08-12 | 2022-08-11 | Device for the internal bending of pipes for pipelines |
| AU2022327760A AU2022327760B2 (en) | 2021-08-12 | 2022-08-11 | Device for the internal bending of pipes for pipelines |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102021121057.7A DE102021121057A1 (de) | 2021-08-12 | 2021-08-12 | Vorrichtung und Verfahren zum Innenbiegen von Rohren für Rohrleitungen |
| DE102021121057.7 | 2021-08-12 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2023017129A1 true WO2023017129A1 (de) | 2023-02-16 |
Family
ID=83228806
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/EP2022/072586 Ceased WO2023017129A1 (de) | 2021-08-12 | 2022-08-11 | Vorrichtung zum innenbiegen von rohren für rohrleitungen |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US12453998B2 (de) |
| EP (1) | EP4384334B1 (de) |
| JP (1) | JP7738942B2 (de) |
| CN (1) | CN118201724A (de) |
| AU (1) | AU2022327760B2 (de) |
| CA (1) | CA3229118A1 (de) |
| DE (1) | DE102021121057A1 (de) |
| MX (1) | MX2024001879A (de) |
| WO (1) | WO2023017129A1 (de) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1270059A (en) * | 1970-08-04 | 1972-04-12 | Abram Isaevich Galperin | Pipe bending method and device |
| US3834210A (en) | 1972-06-06 | 1974-09-10 | Crc Crose Int Inc | Pipe bending system |
| JPS58138523A (ja) | 1982-02-15 | 1983-08-17 | Nippon Steel Corp | 金属管の曲げ加工方法 |
| US5092150A (en) | 1991-07-19 | 1992-03-03 | Crc-Evans Pipeline International, Inc. | Pipe transport mechanism for pipe bender |
| DE69603499T2 (de) | 1995-10-30 | 2000-01-27 | Norman Laverne Heaman | Flexibler biegestempel für eine biegemaschine |
| DE60028484T2 (de) | 1999-09-21 | 2006-11-16 | CRC-Evans Pipeline International, Inc., Houston | Automatisierte Rohrbiegevorrichtung und Verfahren zum Biegen eines Rohres |
| DE102008060897A1 (de) | 2008-12-09 | 2010-06-10 | Compaß, Eberhard, Dr. | Biegevorrichtung für Stahlrohre |
| DE102012012139A1 (de) | 2012-06-20 | 2013-12-24 | Isobend GmbH | Vorrichtung und Verfahren zum Biegen von Rohrleitungen für Pipelines |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3014518A (en) * | 1958-12-29 | 1961-12-26 | Crutcher Rolfs Cummings Inc | Pipe bending machine |
| US3382698A (en) * | 1966-03-09 | 1968-05-14 | James H. Anderson | Internal pipe bender |
-
2021
- 2021-08-12 DE DE102021121057.7A patent/DE102021121057A1/de active Pending
-
2022
- 2022-08-11 CA CA3229118A patent/CA3229118A1/en active Pending
- 2022-08-11 JP JP2024508790A patent/JP7738942B2/ja active Active
- 2022-08-11 CN CN202280068083.0A patent/CN118201724A/zh active Pending
- 2022-08-11 EP EP22765456.3A patent/EP4384334B1/de active Active
- 2022-08-11 AU AU2022327760A patent/AU2022327760B2/en active Active
- 2022-08-11 MX MX2024001879A patent/MX2024001879A/es unknown
- 2022-08-11 WO PCT/EP2022/072586 patent/WO2023017129A1/de not_active Ceased
- 2022-08-11 US US18/682,757 patent/US12453998B2/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1270059A (en) * | 1970-08-04 | 1972-04-12 | Abram Isaevich Galperin | Pipe bending method and device |
| US3834210A (en) | 1972-06-06 | 1974-09-10 | Crc Crose Int Inc | Pipe bending system |
| JPS58138523A (ja) | 1982-02-15 | 1983-08-17 | Nippon Steel Corp | 金属管の曲げ加工方法 |
| US5092150A (en) | 1991-07-19 | 1992-03-03 | Crc-Evans Pipeline International, Inc. | Pipe transport mechanism for pipe bender |
| DE69603499T2 (de) | 1995-10-30 | 2000-01-27 | Norman Laverne Heaman | Flexibler biegestempel für eine biegemaschine |
| DE60028484T2 (de) | 1999-09-21 | 2006-11-16 | CRC-Evans Pipeline International, Inc., Houston | Automatisierte Rohrbiegevorrichtung und Verfahren zum Biegen eines Rohres |
| DE102008060897A1 (de) | 2008-12-09 | 2010-06-10 | Compaß, Eberhard, Dr. | Biegevorrichtung für Stahlrohre |
| DE102012012139A1 (de) | 2012-06-20 | 2013-12-24 | Isobend GmbH | Vorrichtung und Verfahren zum Biegen von Rohrleitungen für Pipelines |
Also Published As
| Publication number | Publication date |
|---|---|
| CA3229118A1 (en) | 2023-02-16 |
| EP4384334A1 (de) | 2024-06-19 |
| EP4384334B1 (de) | 2025-10-22 |
| AU2022327760B2 (en) | 2026-01-22 |
| MX2024001879A (es) | 2024-05-15 |
| CN118201724A (zh) | 2024-06-14 |
| US12453998B2 (en) | 2025-10-28 |
| EP4384334C0 (de) | 2025-10-22 |
| JP7738942B2 (ja) | 2025-09-16 |
| US20240342780A1 (en) | 2024-10-17 |
| DE102021121057A1 (de) | 2023-02-16 |
| JP2024535679A (ja) | 2024-10-02 |
| AU2022327760A1 (en) | 2024-03-07 |
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