• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    For renovation of a main tube (1), which is deformed there, where a side tube connects to a branch (7) of the main tube (1), a section of the main tube (1) 5 is taken out, which contains the branch (7) , then the two now created both ends (4) of the main tube (1) are formed in a circular cross section, then the deformation repair rings (8) are pulled up on the now circular ends (4), a T-piece (5) tube component inserted between the two ends (4) of the main tube (1) and connected liquid-tight by means of tube couplings (11). 10
    公开号:NL2023909A
    申请号:NL2023909
    申请日:2019-09-26
    公开日:2020-05-01
    发明作者:Funke Norbert；Funke Hans-Günter
    申请人:Funke Kunststoffe Gmbh；
    IPC主号:
    专利说明:

    Title: Renovation of a pipeline with a branch
    The invention relates to the renovation of a pipeline provided with a branch.
    In practice, it is known, for example in the development of new building plots, that constructed pipes, that is to say laid in the ground, in the form of corrugated pipes or also smooth-walled pipes, are later provided with a house connection piece, in order to discharge rainwater or dirty water into the pipeline. can lead. For this purpose, a borehole is made in the pipeline to create a fluid-carrying connection from the house connection pipe to the pipeline. The house connection is mounted liquid-tight on the pipeline and thus allows the connection of a house connection pipe, for example in the form of a conventional pipe connection, wherein the connection piece comprises a sleeve which can receive one end of the house connection pipe. The house connection pipe has a smaller diameter than the pipeline, so that the pipe line is referred to as the main pipe and the house connection pipe as the secondary pipe.
    Usually, in the development of new construction areas, several house connection pipes, i.e. secondary pipes, are connected to the main pipe. The bores, which are made in the main tube for mounting the connection pieces, have statically weakened the main tube near the connection pieces. In practice, it can therefore be observed again and again that the main tube is strongly deformed, for example because of the load on the bottom, and then no longer comprises a circular cross-section, but a flat, oval cross-section.
    This increases the surface area of the head tube that is exposed to pressure from above, and reinforces that, due to the deformation, the pressure stability of the head tube decreases, so that damage to the head tube can be feared, which can occur in the form of cracks or breakage and leakage of the head tube.
    In addition, the deformation of the main tube also changes the position of the branch, so that leaks can occur where the side tube connects to the branch of the main tube. When the extension tube is subjected to shear loads, damage to the extension tube can also occur in the form of cracks or breaks.
    In order to avoid unwanted and uncontrolled discharges into the environment and to ensure the tightness of the main pipe near the branches, these locations should be repaired.
    The object of the invention is to provide a method for the renovation of the main tube near the branch. The object of the invention is moreover the object of providing a device suitable for carrying out the method.
    This object is achieved by the method according to claim 1, by deformation repair rings according to claims 10 and 13, by a T-piece according to claim 15 and by a repair kit according to claim 17. Advantageous embodiments are discussed in the claims.
    According to the present invention, a renovation of the main tube in the region, in which a side tube connects to a branch of the main tube, and in which the main tube has a deformed cross section, is carried out by the method set forth below.
    As an exemplary embodiment, a main tube is used as a pipeline, which is in the form of a corrugated tube, i.e. comprises a smooth inner wall, which defines the inner diameter of the main tube, and comprises a corrugated outer wall, which defines the outer diameter of the main tube. At a nominal diameter or outer diameter of 250 mm, this main tube has an inner diameter of 217 mm and thus a wall thickness of 16.5 mm. Contrary to this embodiment, the main tube may be smooth-walled and / or comprise dimensions other than those indicated.
    After the main pipe laid in the ground has been exposed near its branch, a 50 cm length of ribbed pipe (from the center of the connection 25 cm on both sides) is removed from the pipe near the branch, so that two free ends of the main tube or corrugated tube, which have a distance of 50 cm from each other. The two cuts, which are made for this purpose in the main tube, are respectively inserted in the main pipe approximately at a distance from the center of the branch, which corresponds to the outer diameter or nominal diameter of the main tube.
    The secondary tube is disconnected from the branch of the main pipe. This can take place, for example, before the cuts are made in the main tube, in order to protect the secondary tube against vibrations or other undesired influences, which could otherwise be transferred to the secondary tube during machining of the main tube. However, it is also possible that the secondary tube is not disconnected from the main tube until the two cuts have already been made in the main tube. Since the cut section of the main tube and thus the branch is then more freely movable, the disconnection of the side tube from the branch is facilitated.
    The cut section of the main tube is then removed from the main tube and a cut in the main tube is thus obtained. The originally continuous corrugated tube or main tube now has two free ends on either side of the cutout.
    With a clamping device, both free ends of the corrugated tube are reformed and brought into a circular cross section.
    So-called deformation repair rings are placed in both free, circular ends of the corrugated pipe. These are statically capable of permanently holding the corrugated pipe in the circular cross-section, thus counteracting or eliminating the deformation of the main pipe and keeping it from deformation. By sliding or pulling the two deformation repair rings on the outside of the two free ends of the main tube, the free internal cross section of the main tube is not affected. In particular, no protrusions or edges are created, to which deposits or foreign objects can accumulate, which impede flow of the main tube.
    A tee is placed in the pipe. The T-piece has been designed as a tube component, on the one hand it replaces the previously removed section of the main tube by means of a so-called main tube section and on the other hand also includes a branch, such as the previously removed section of the original main tube. The tee preferably includes the same inner diameter as the main tube, so that an even, protrusion-free transition is ensured between the two free ends of the main tube and both ends of the tee.
    The T-piece can be matched to the corrugated pipe in terms of its wall thickness: due to the comparable wall strength, a particularly high stability of the T-piece is guaranteed. In addition, a tight connection at the ends of the main tube is facilitated when the outer diameters of the T-piece and of the main tube are equal or only slightly different.
    The connection of the flexible tube to the T-piece is carried out in a known manner using tube couplings. It may be advantageous to use so-called sleeve couplings, which have a high tolerance for mutually different diameters, for example, commercially available pipe couplings, commonly used under the designation "VPC", which have proven themselves in practice. These not only ensure a tight connection of the T-piece to the respective free end of the main tube or flexible tube, but can also compensate for mutually different shapes of the two tubes to be joined. This concerns on the one hand the compensation of different outer diameters, but also the possibility to adapt to deviations of a circular cross section.
    Namely, depending on how tightly a deformation repair ring fits around the main tube, the main tube may either have an ideal circular cross section or it may still deviate slightly from the circular cross section. To achieve a circular cross section, it may be advantageous that the inner diameters of the deformation recovery ring are as large as the outer diameter of the main tube in the state when the main tube includes a circular cross section. However, a slightly larger inner diameter of the deformation repair ring facilitates mounting on the main tube, so that on this basis a small deviation from an ideal circular cross section of the main tube can be accepted, especially since such a deviation can be smoothly compensated by a cuff coupling.
    The essential advantage of the present invention lies in the restoration of the roundness of the main tube by a tensioning device and the fixation of the roundness with the "deformation repair ring". Apart from the fact that the T-piece used can have a higher stability than the originally used main tube, the deformation repair rings achieve a twofold stabilization of the main tube: as already discussed, the main tube with a circular cross-section is more stable against compressive loads acting from above than with an oval flattened cross-section, and the deformation repair rings ensure that the main tube maintains this circular cross-section. Second, the deformation repair rings, which lie against the outer wall of the main tube, provide greater mechanical stability. The main tube is therefore renovated for a long time by the method as described.
    To bring the oval shaped ends of the main tube back into circular cross sections, either a tool designed as a screw clamp can be used, and it comprises two tension arms, the spacing of which is adjustable. Due to the oval deformation, the main tube has different diameters in different radial directions. Both clamping arms of the screw clamp are placed there against the main tube, where the main tube has its largest diameter. When subsequently both tension arms are moved towards each other, for instance hydraulically or by means of a spindle, the main tube is formed back from its oval deformation into a circular cross section.
    As an alternative to the screw clamp, whose tension arms are moved linearly or apart, a tool designed as a scissor clamp can be used and comprises two gripping arms which can pivot relative to each other and rotate about a common pivot axis. Depending on which distance from the pivot axis the gripping arms are operated, the driving forces required for deformation of the main tube may be greater or smaller as a result of the leverage, so that in a suitable embodiment of the scissor clamp the deformation of the main tube is possible with a relatively low , drive energy required for the implement.
    It can be advantageous to act on the clamping clamping arms or the clamping clamp gripping arms on the main tube as large as possible, in order to achieve a low surface pressure and thus protect the main tube against mechanical damage. It can be advantageous for this that the tool used comprises curved pressure plates with which it can be laid on the main tube. The bending of the pressure plates is adapted to the circular outer diameter, which the deformed main tube should then have, and which also includes the main tube in its non-deformed areas. This adjustment to the main tube diameter can mean, for example, that the bending radius of the pressure plates is equal to the outer radius of the main tube. However, it is also possible that a bending radius of the pressure plates is slightly greater than the outer radius of the main tube. In this way, a pressure distribution over a large area is still achieved, while at the same time impression edges can be avoided, which could otherwise be introduced unintentionally into the main tube.
    Therefore, for main tubes with different outer diameters, either different tools can be provided, or interchangeable pressure plates with different bends can be used on the same tool. The pressure plates can also include interchangeable inserts so that, for example, a pressure plate has the largest bend radius possible, and is equipped to accommodate interchangeable inserts that are mounted against the pressure plate and include smaller bend radii to adapt to different head tube diameters.
    It is possible to slide a deformation repair ring either only partially on the main tube, or completely, but only slide it far enough on the main tube to enclose it flush with the free end of the main tube. In this case, the pipe coupling is attached to the deformation repair ring on the outside. In addition to the liquid-tight connection of the pipe coupling to the deformation repair ring, this requires a liquid-tight connection of the deformation repair ring to the main pipe, i.e. two seals. Therefore, it may advantageously be possible to slide the deformation repair ring onto the main tube so far that the free end of the main tube protrudes from the deformation adjustment ring. In this way, the pipe coupling can be directly attached to the main pipe on the outside. This confirms the operational reliability of the renovation measure, as a single seal is now required.
    Thus, a deformation repair ring that can be used for the proposed method includes an inner diameter equal to or slightly larger than the outer diameter of the main tube.
    It may be advantageous that the deformation repair ring, which can be used for the proposed method, includes an outwardly projecting portion, which can be used as a force engagement, and to which a tool can also be attached, to attach the deformation repair ring to the main tube . The outwardly projecting portion simplifies this operation, compared to the situation where the deformation repair ring is only gripped along its annular, circumferential front face and must be pushed or pulled.
    It may be advantageous to design this outwardly projecting part as an all-round rib, so that the force engagement comprises a particularly large surface and it can distribute the acting forces in a material-friendly manner over a large surface.
    It may in particular be advantageous here that the circumferential rib is designed as a bead, i.e. as a hollow rib. This gives the rib a particularly high dimensional stability and avoids material build-up which could otherwise lead to unwanted deformations of the deformation repair ring. Namely, when, for example, the deformation repair ring cools during its manufacture, such material build-ups can lead to a locally large volume shortage, which can cause deformations of surrounding areas in addition to local plunge spots. For example, when the deformation repair ring is made of plastic, the comparatively high thermal expansion coefficient may lead to deformations which, in view of the possibly tight tolerances with which the deformation repair ring surrounds the main tube, can make mounting of the deformation repair ring more difficult. Such problems are avoided by designing the rib as a bead.
    Basically, therefore, a section of a conventional pipeline can be used, which, for example, comprises a bead for the installation of a seal, which can be used as force application in the context of the proposed method. However, the conventional pipelines do not have an inner diameter that corresponds to the outer diameter of the main tube or are only so much larger that they can effect the desired deformation recovery of the main tube. A deformation repair ring is therefore characterized by this adaptation of its inner diameter to the outer diameter of the main tube.
    It may be advantageous that a deformation repair ring that can be used for the intended method includes an insertion rim that simplifies inserting the free end of the main tube into the deformation repair ring or sliding the deformation repair ring over the free end of the main tube . This input edge is formed at a front end of the deformation repair ring, characterized in that this front end has a bevel, for example of 45 °, which extends from the outside inwards and obliquely towards the interior of the deformation repair ring. It may be advantageous that this chamfer extends over the entire wall thickness of the deformation repair ring to achieve an even sliding movement between the deformation repair ring and the free end of the main tube.
    In principle, a conventional pipe component can be used as a tee for the intended method, which T-shaped comprises two adjacent pipe sections. A tee which is particularly well suited for the proposed process may be a special component and have a wall strength equal to the wall strength of the main tube. In particular, when the main tube is in the form of a corrugated tube, this means that the main tube section of the T-piece has an unusually high wall strength and a correspondingly high mechanical stability.
    In order to carry out the intended method, it may be advantageous to use a repair kit containing the required components composed in such a way that these components are matched to each other and to the main pipe to be renovated, for example as to the respective inner and outer diameters, and also as for the length of the main tube section of the tee. To this end, the repair kit includes the T-piece, the inner diameter of which is the same size as the inner diameter of the main tube. Furthermore, the repair kit includes two deformation repair rings, the inner diameter of which is adapted to the outer diameter of the main tube. Finally, the repair kit also includes two pipe fittings, which allow the liquid-tight connection of the T-piece at both ends of the main pipe.
    The intended repair kit may be referred to as a “repeat repair kit”. As a distinction therefrom, a "starter repair kit" may also include a tool required to reshape the deformed head tube, for example, the previously described screw clamp or the illustrated scissor clamp. Due to the fact that this tool is not included in every repair kit, the “repeat repair kit” may be cheaper to offer as it only contains consumables needed for refurbishment.
    The present proposal is further explained below on the basis of purely schematic representations. Thereby shows
    Fig. 1 a longitudinal section of a renovated part of a pipeline
    Fig. 2 and 3 two embodiments of tools for shaping a main tube
    In FIG. 1 a pipeline is shown, which is designated as main tube 1 and is constructed as corrugated tube, which comprises a smooth inner tube 2 and a ribbed outer tube 3. Two cuts are made in the main tube 1, so that it now comprises a cut-out, which is delimited by the two free ends 4 of the originally continuous main tube 1. In the section of main tube 1, a T-piece 5 is inserted, which comprises a main tube section 6 and a branch 7. The main tube section 6 of the tee 5 has the same wall strength as a smooth tube as the main tube 1 designed as a corrugated tube.
    A deformation repair ring 8 is slid onto the two free ends 4 of the main tube 1, the inner diameter of which is adapted to the outer diameter of main tube 1. This mounting, which is referred to as "pulling up" the deformation repair ring 8, is facilitated by a chamfer 9 which is arranged at a front end of the deformation repair ring and extends over the entire wall thickness. An all-round projection, designed as an inwardly opening bead, serves as a force application to which a tool for mounting the deformation repair ring 8 can be placed. The two deformation repair rings 8 are respectively pulled up on the main tube 1 such that the main tube 1 with its respective free ends 4 protrudes from the respective deformation repair ring 8.
    A pipe coupling 11 connects the main pipe section 6 of the tee 5 to the main pipe
    1. This is an elastic sleeve coupling, which can compensate for diameter differences and deviations from an ideal circular cross-sectional shape.
    The branch 7 comprises a ball-segment-shaped section 12 in which a sleeve 14 can be tilted in all directions, i.e. staggered. The sleeve 14 serves to receive the front end of a secondary tube, which is connected to the main tube 1 by means of the branch 7.
    In FIG. 2, a tool is shown, which is designed as screw clamp 15 and in known manner comprises two tensioning arms 16 and also a guide rail 17. The two tension arms 16 are respectively made in several parts and respectively comprise a curved pressure plate 18. In addition to the fact that the distance between the tension arms 16 is adjustable as a basic setting, starting from this basic setting, the distance between the two tension arms 16 - namely with their two pressure plates 18 - can be further adjusted by means of a spindle 19. The spindle 19 acts on the pressure plate 18 shown on the right and is guided through the tension arm 16 shown on the right. An oval-shaped main tube 1 is shown between the two pressure plates 18. The two pressure plates 18 abut the two furthest apart circumferential segments of main tube 1. The bending radius of a pressure plate 18 is greater than the outer radius of the main tube 1 when it comprises a circular cross section.
    Fig. 3 shows a tool used as an alternative to the screw clamp 15 of FIG. 2 can be used to reform a deformed main tube 1 into its circular cross-sectional shape. The tool of Fig. 3 is designed as a scissor clamp 20 and comprises two gripping arms 21, which can rotate about a joint hinge 22, and are also provided with curved pressure plates 18. A spindle 19 for operation is also shown for the scissor clamp 20 purely as an example. Contrary to the shown embodiment, the two gripping arms 21 can extend further above the hinge 22, and the spindle 19 can consequently connect to the gripping arms 21 higher and at a greater distance from the hinge 22.
    References:
    1 Main tube 2 Inner tube 3 Outer tube 4 Free end 5 Tee 6 Main tube section 7 Branch 8 Deformation reset ring 9 Chamfer 10 Beadwork 11 Tube coupling 12 Ball segment-shaped section 14 Sleeve 15 Screw clamp 16 Tension arm 17 Guide rail 18 Pressure plate 19 Spindle 20 Scissor clamp 21 Grab arm 22 Hinge
    权利要求:
    Claims (20)
    [1]
    Method for the renovation of a pipeline connection, in which a main pipe (1) comprises a branch (7), a secondary pipe is connected to the branch (7) of the main pipe (1), the main pipe (1) has a cross-sectional shape, which near the branch (7) deviates from circular, and the following method steps are performed:
    • Insertion of two cuts into the main tube (1) on either side of the branch (7), • Separation of the side tube from the branch (7) of the main tube (1), • Removal of the cut section of the main tube (1 ) from the remaining main tube (1), thus forming a cutout in the main tube (1), • Formation of respective circular cross-sections at the two now created ends (4) of the main tube (1), • Drawing up the respective , the main tube (1) tight-fitting deformation repair rings (8) at both ends (4) of the main tube (1).
    • Inserting a T-piece (5) designed as a tube component into the cut-out of the main tube (1), whereby the T-piece (5) first has a so-called main tube section (6) which interrupts the main tube (1) caused by the cut-out. and secondly includes a branch (7), which opens into the main tube section (6), • Manufacture of a mechanical and liquid-tight connection of the main tube section (6) of the T-piece (5) with the main tube (1) and of the branch (7) of the T-piece (5) with the extension tube.
    [2]
    Method according to claim 1, characterized in that both cuts are introduced into the main tube (1) at a distance from the center of the branch (7), which corresponds to the outer diameter of the main tube (1).
    [3]
    Method according to claim 1 or 2, characterized in that for forming a circular cross section a screw clamp (15) is placed against the main tube (1) in such a way that the two clamping arms (16) of the screw clamp (15) ) lie against the two furthest apart circumferential segments of the main tube (1), and subsequently the distance between the two tensioning arms (16) is reduced.
    [4]
    Method according to claim 1 or 2, characterized in that to form a circular cross section a scissor clamp (20) is placed against the main tube (1) in such a way that the two gripping arms (21) of the scissor clamp (20) ) lie against the two furthest apart circumferential segments of the main tube (1), and subsequently the distance between the two gripping arms (21) is reduced.
    [5]
    Method according to claim 3 or 4, characterized in that the tool used for forming comprises curved printing plates (18) with which it is placed against the main tube (1), the bending of the printing plates (18) being adapted for pressure distribution on the circular outer diameter of the main tube (1).
    [6]
    Method according to one of the preceding claims, characterized in that a T-piece (5) is used, the main tube section (6) of which has the same inner diameter as the main tube (1).
    [7]
    A method according to any one of the preceding claims, characterized in that a T-piece (5) is used, the main tube section (6) of which has the same outer diameter as the main tube (1).
    [8]
    Method according to one of the preceding claims, characterized in that the deformation repair rings (8) are pulled up on both ends (4) of the main tube (1) so far that the ends (4) of the main tube (1) respectively protrude from the deformation repair ring (8).
    [9]
    Method according to any one of the preceding claims, characterized in that the mechanical and liquid-tight connection between the main tube section (6) of the T-piece (5) with the main tube (1) is respectively produced by an elastic cuff coupling.
    [10]
    Deformation repair ring (8) for carrying out the method according to one of the preceding claims, characterized by an outwardly protruding projection (10) which can be used as force application.
    [11]
    Deformation repair ring according to claim 10, characterized in that the projection (10) is designed as an all-round rib.
    [12]
    Deformation repair ring according to Claim 11, characterized in that the projection (10) is designed as an all-round bead.
    [13]
    Deformation repair ring for carrying out the method according to any one of the preceding claims, characterized by a bevel (9) running from the outside inwards, obliquely towards the interior, at a front end of the deformation repair ring (8) ).
    [14]
    Deformation repair ring according to claim 13, characterized in that the bevel (9) extends over the entire wall thickness.
    [15]
    T-piece designed as a pipe component for carrying out the method according to any one of the preceding claims, characterized in that the main pipe section (6) has the same inner diameter and the same wall thickness as the main pipe (1).
    [16]
    T-piece according to claim 15, characterized in that the branch (7) comprises a ball-segment-shaped section (12) in which a coupling element enabling the connection of the side tube is supported in a staggered manner.
    [17]
    Repair kit for performing the method according to any of the preceding claims, wherein the repair kit includes the following elements:
    • a tee (5), the main tube section (6) of which has the same inner diameter as the main tube (1), • two deformation repair rings (8), the inner diameters of which are the same size or slightly larger than the outer diameter of the circular main tube ( 1), • two pipe couplings (11) respectively adapted to firstly the outer diameter of the main pipe section (6) of the T-piece (5) and secondly to the outer diameter of the main pipe (1) so that they are liquid-tight connection of the T-piece (5) to the main tube (1).
    [18]
    Repair kit according to claim 17, characterized in that the repair kit comprises a tool for shaping the main tube (1) with a circular cross section.
    [19]
    Repair kit according to claim 18, characterized in that the tool is designed as a screw clamp (15), the two clamping arms (16) of which respectively comprise a curved pressure plate (18), which can be fitted against the main tube (1) and have a bend , which is adapted to the circular outer diameter of the main tube (1).
    [20]
    Repair set according to claim 18, characterized in that the tool is designed as a scissor clamp (20), the two gripping arms (21) of which respectively comprise a curved pressure plate (18), which can be fitted against the main tube (1) and have a bend , which is adapted to the circular outer diameter of the main tube (1).
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    同族专利:
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    DE102019125298A1|2020-04-02|
    引用文献:
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    CN113199201A|2021-04-25|2021-08-03|中国石油天然气集团有限公司|Sleeve for repairing butt-joint girth weld defects of tee main pipe and machining and repairing method|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE102018124046|2018-09-28|
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