DE102017110468B4 - Insertion template and method for drawing a specific pipe cutting line on a pipe end - Google Patents

Abstract

Insert template (1) for drawing a specific pipe cutting line (10) on a pipe end (11), comprising: - a hard stencil ring (2) whose template ring edge (3) for drawing a specific pipe cutting line (10) by means of a drawing instrument applied thereto and guided ( 13) is formed, and- a plurality of elastic Einsteckstege (4) for insertion into the pipe end (11) extending axially from the stencil ring edge (3) and for temporary attachment of the stencil ring (2) in front of the pipe end (11) are formed.

Description

Technical area

The invention relates to a template for drawing a specific pipe cutting line on a pipe end. Furthermore, the invention relates to a corresponding method and finds particular application to a cutting of pipe ends when laying pipes in a curve.

State of the art

In order to connect tubes of a similar cross-section, for example by welding, suitable cuts are required at pipe ends to be connected. This is not easy in practice, especially when individual straight pieces of pipe at an angle to each other must be laid in a curve.

For example, from the patent AT000000135962B a device for obliquely cutting off and dividing pipes and for performing curved cuts by means of a cutting torch, in which a reciprocating burner produces cuts in the rotating pipe. To perform oblique planar cuts, the cutting torch is given a slowly oscillating movement in the axial direction during the uniform rotation of the tube. It is also known to apply a straight strip of flexible material as a template on the outer surface of the tube to be cut for easy vertical cutting of pipe ends.

The publication DE 103 36 032 A1 discloses a device for cutting tubular workpieces, with which a fixed tube can be cut to length with a flexibly movable cutting device with an arbitrary contour.

It is an object of the invention to provide a robust and in practice easy and especially without computer use feasible solution for producing matching cuts at pipe ends of each other at an angle, in particular by welding pipes to be joined.

Disclosure of the invention

According to the invention, there are provided an insert template for drawing a particular pipe cutting line on a pipe end according to claim 1, a corresponding use of the insert template, a method for drawing a specific pipe cutting line on a pipe end and a method for laying pipes in a curve according to the independent claims. Further embodiments are given in the dependent claims. All further features and effects mentioned in the claims and in the description for the insertion template also apply with respect to the use and the two methods, and vice versa.

• - einen harten Schablonenring, dessen Schablonenringrand zum Einzeichnen einer bestimmten Rohrabschneidlinie mittels eines am Schablonenringrand angelegten und geführten Zeicheninstruments ausgebildet ist, und
• - mehrere elastische Einsteckstege zum Einstecken in das Rohrende, die sich vom Schablonenringrand aus axial bezüglich einer Schablonenringachse erstrecken und zur temporären Befestigung des Schablonenrings vor dem Rohrende ausgebildet sind. Um das Einstecken ins Rohrende und die Befestigung daran zu unterstützen, können die elastischen Einsteckstege insbesondere in bezüglich der Schablonenringachse radialer Richtung federnd ausgebildet sein.

According to a first aspect, there is provided an insert template for drawing a particular pipe cutting line on a pipe end, the insert template comprising:

• a hard stencil ring whose stencil ring edge is designed to draw a specific pipe cutting line by means of a drawing instrument applied and guided on the stencil ring edge, and
• - A plurality of elastic Einsteckstege for insertion into the tube end, which extend from the stencil ring edge axially with respect to a stencil ring axis and are designed for temporary attachment of the stencil ring in front of the tube end. In order to support the insertion into the pipe end and the attachment thereto, the elastic insertion webs may be resilient, in particular with respect to the stencil ring axis radial direction.

This is primarily about tubes of a round cross-section, in which the production for welding together etc. suitable oblique cuts in practice is particularly demanding. However, it is also obvious to those skilled applications of the solution set forth herein on tubes of a circular deviating cross-section - for example, an oval, in particular elliptical, or even rectangular cross-section - possible. The term "stencil ring" can be understood in such cases as a generalized collective term for templates of various cross-sectional shapes. As a rule, the stencil ring cross section has a geometric shape substantially corresponding to the pipe end cross section, in particular that of a circular ring in the case of a round pipe end cross section. (Here and below, "substantially" means, in particular, a possible manufacturing or design-related possible deviation of up to about 10% of the dimensions concerned.)

The drawing instrument may be any conventional instrument suitable for drawing a tube cutting line on a tube end surface along the template rim. For example, the drawing instrument may include a spacer for defining a constant distance between the stencil ring edge and the pipe cutting line to be engraved, such as a flat stick or a ruler. This can be chalk, a paint pen, a ballpoint pen, a pointed scratched object or something else Marking object be hand-guided or attached.

One idea of the solution set forth herein is to define a particular pipe cutting line, particularly for obliquely cutting a pipe end, by positioning a hard stencil ring edge of a suitable shape in front of the pipe end to be cut off. By means of the plurality of elastic Einsteckstege it is possible, the stencil ring in a simple and robust way before the pipe end temporarily, d. H. for performing the drawing, fasten. It may be possible in particular to position the Einsteckstege at the pipe end depending on the application such that a stencil ring axis coincides with a pipe end axis or forms a certain angle.

The provision of the hard stencil ring with a suitably formed stencil ring edge and the flexible Einsteckstege for temporarily attaching the stencil ring in front of the pipe end provides a simple and robust solution for generating a basically any suitably selected pipe cutting line in practice no computer use, control technology or on mathematical calculation based curve drawing in an individual case requires.

The tube to be cut off can in particular be made of metal or another hard material such as fiber-reinforced plastic, etc. The pipe end may in particular have an outer diameter of at least 10 cm, at least 20 cm, at least 30 cm, at least 40 cm, at least 50 cm, at least 60 cm, at least 70 cm, at least 80 cm, at least 90 cm, at least 1 m or even more clearly have more. Its outside diameter may be, for example, between about 10 cm and 1.5 m, between 15 cm and 1.2 m, between 20 cm and 90 cm, between 25 cm and 60 cm, between 30 cm and 50 cm, in particular about 30 cm, 40 cm or 50 cm. It may, for example, be a water pipe, in particular a pipe, heating or sewage pipe, a gas pipe or an oil pipe, in particular a petroleum pipe.

In particular, the hard stencil ring and / or at least one of the Einsteckstege of metal or other suitable material, for example, be made of plastic with or without fiber reinforcement. The stencil ring and the Einsteckstege can be made of the same or from different, each better suited for said functionality materials.

The plurality of Einsteckstege can be formed in a simple case substantially the same. But it may also be useful to make one or more of the Einsteckstege different from the remaining Einsteckstegen. Thus, one or more of the following specific features may be provided on one, some, or all of the insertion ridges of the insertion template.

In a specific embodiment, precise positioning of the template ring in front of the pipe end may be assisted by the provision of a scale on at least one of the plug-in webs.

Furthermore, the insertion webs can in particular be connectable or connected to an inner side of the template ring such that the template ring edge remains free to apply and guide the drawing instrument.

In particular, the Einsteckstege can permanently connected to the stencil ring, for example, welded, molded or integrally formed therewith. Alternatively, they can also be removable and exchangeable, for example, against Einsteckstege another embodiment.

In one embodiment, the insertion template has exactly three along the stencil rim edge - in particular substantially uniformly distributed - Einsteckstege, which is material-saving and at the same time can allow a particularly simple, fast and precise alignment of the stencil ring with respect to the tailpipe in any required angle. Alternatively, the insertion template may also have two, four or more along the template ring edge in particular substantially uniformly distributed Einsteckstege.

At least one of the Einsteckstege may have a hollow cross-section, which may in particular be substantially rectangular. This can for example ensure a special stability of the Einsteckstegs and thus the attachment of the stencil ring in front of the pipe end and / or facilitate the attachment and handling of an adjustable fastening means, such as a screw, etc., on Einstecksteg. Alternatively or additionally, at least one of the Einsteckstege represent a resilient strip or rod, which can sometimes be easier to manufacture.

In one embodiment, the plurality of Einsteckstege the insertion template are formed such that the stencil ring in front of the pipe end in several different positions can be temporarily fastened, the different positions correspond in particular different angles between a stencil ring axis and a pipe end axis. This allows the alignment of the can be set with respect to the tube end axis as required, for example, depending on the radius of curvature of the pipe curve to be laid and the number of individual straight pipe sections to be set.

In this or other embodiments, at least one of the Einsteckstege at its axial extent from the stencil ring edge of at least one substantially parallel to the stencil ring axis and at least one stencil ring axis inclined towards the web portion. In particular, starting from the template ring edge, an axially parallel, an inclined and a further axis-parallel web section can alternate. These embodiments may in particular facilitate the insertion and / or fastening of the Einsteckstege at the pipe end and / or the setting of a certain angle between the stencil ring axis and the pipe end axis.

Furthermore, at least one of the Einsteckstege one, two or more adjustable fastening means, in particular screws, which are designed for temporary attachment and / or to an adjustable positioning of the stencil ring in front of the pipe end.

In one embodiment, the stencil ring edge is formed substantially circular in a plane perpendicular to the stencil ring axis. In this embodiment, the drawing of an oblique circular pipe cutting line can be realized in that the Einsteckstege are inserted at different depths in the pipe end, whereby a suitable acute angle between the stencil ring axis and the pipe end axis can be formed.

In an alternative embodiment, the stencil ring edge can be substantially circular in a plane oblique to the stencil ring axis, resulting in a correspondingly constant tilt angle of the pipe cutting line to be engraved with respect to the pipe end axis in the case of an axis-parallel alignment of the stencil ring in front of the pipe end. This may be useful, for example, when often the same tilt angle of the circular pipe cutting line is required with respect to the pipe end axis.

In particular, the stencil ring can represent a pipe section. In this embodiment, in particular an inner and / or outer dimension of the stencil ring or stencil ring edge substantially similar to that of the pipe end, with certain deviations within +/- 10% for applying a drawing instrument at the stencil ring edge and pulling the drawing instrument via a pipe end outer surface and / or be useful for inserting the Einsteckstege in the pipe end.

Another aspect is the use of an insert template of the type set forth herein to draw a particular pipe cutting line on a pipe end.

• - Bereitstellen eines Rohrs mit einem Rohrende, das entlang einer bestimmten Rohrabschneidlinie abgeschnitten/nachgeschnitten werden soll;
• - temporäres Befestigen des Schablonenrings der Einsteckschablone vor dem Rohrende, wobei Einsteckstege axial bezüglich einer Rohrendachse in das Rohrende eingesteckt werden;
• - Einzeichnen der bestimmten Rohrabschneidlinie auf einer Außenoberfläche des Rohrendes durch das Anlegen und Führen eines Zeicheninstruments am Schablonenringrand;
• - Entfernen der Einsteckschablone von dem Rohrende.

According to another aspect, there is further provided a method of drawing a particular pipe cutting line on a pipe end by means of a shank cartridge of the type set forth herein, the method comprising the steps of:

• Providing a tube having a tube end to be cut / resected along a particular tube cutting line;
• - Temporarily attaching the stencil ring of the insertion template in front of the pipe end, wherein Einsteckstege be inserted axially with respect to a pipe end axis in the pipe end;
• - drawing the determined pipe cutting line on an outer surface of the pipe end by applying and guiding a drawing instrument to the stencil ring edge;
• - Removing the stencil from the pipe end.

In this case, a tube cutting line suitable in an individual case can be known or predetermined, for example, from the experience of the user of the insert template, and / or can be estimated or calculated from existing application parameters such as a radius of curvature of a pipe curve to be laid and a number of individual straight pipe sections.

In particular, during temporary fastening by means of the insertion webs, a specific axial distance of the template ring from the pipe end and / or a specific angle between a template ring axis and a pipe end axis can be set, whereby the specific pipe cutting line to be drawn on a pipe end outer surface is defined.

• - Bereitstellen mehrerer gerader Rohrstücke, die zueinander angewinkelt miteinander verbunden werden sollen, um eine Kurve auszubilden;
• - Bestimmen geeigneter schräger Rohrabschneidlinien für Rohrenden der jeweils zu verbindenden Rohrstücke;
• - Einzeichnen der bestimmten Rohrabschneidlinien auf Außenoberflächen der jeweiligen Rohrenden gemäß einem hierin dargelegten Verfahren zum Einzeichnen einer bestimmten Rohrabschneidlinie auf einem Rohrende mittels einer Einsteckschablone der hierin dargelegten Art;
• - Abschneiden der jeweiligen Rohrenden entlang der eingezeichneten bestimmten Rohrabschneidlinien; und
• - Verbinden der so abgeschnittenen/nachgeschnittenen Rohrenden der jeweiligen Rohrstücke, insbesondere durch Schweißen.

Another aspect is a method for laying pipes in a curve, with the steps:

• - Providing a plurality of straight pipe sections which are angled to each other to be connected together to form a curve;
• - Determining suitable oblique pipe cutting lines for pipe ends of each pipe sections to be joined;
• - Drawing the specific pipe cutting lines on the outer surfaces of the respective Pipe ends according to a method set forth herein for drawing a particular pipe cutting line on a pipe end by means of a plug-in template of the type set forth herein;
• - Cutting the respective pipe ends along the marked specific pipe cutting lines; and
• - Connecting the thus cut / cut pipe ends of the respective pipe sections, in particular by welding.

list of figures

• 1 eine perspektivische Ansicht einer Einsteckschablone zum Einzeichnen einer bestimmten Rohrabschneidlinie auf einem Rohrende;
• 2a und 2b Seitenansichten der Einsteckschablone der 1 beim Einzeichnen der bestimmten Rohrabschneidlinie, wobei der Schablonenring vor dem Rohrende temporär befestigt ist;
• 3 eine Seitenansicht zusammengeführter Rohrenden, die entlang der eingezeichneten bestimmten Rohrabschneidlinien der 2a und 2b abgeschnitten sind;
• 4 eine perspektivische Ansicht von in einer Kurve verlegten geraden Rohrstücken, deren Rohrenden wie in 1 bis 3 abgeschnitten wurden.

Embodiments will be explained in more detail with reference to the examples shown in the accompanying drawings. Although the drawings can be read as true to scale, but this is not mandatory for the illustrated embodiments. Ie. The drawings are more generally understood to be purely schematic and therefore not to scale. Show it:

• 1 a perspective view of a Einsteckschablone for drawing a specific pipe cutting line on a pipe end;
• 2a and 2 B Side views of the insert template 1 when drawing the particular pipe cutting line, wherein the stencil ring is temporarily fixed in front of the pipe end;
• 3 a side view of merged pipe ends, along the marked specific pipe cutting lines of the 2a and 2 B are cut off;
• 4 a perspective view of laid in a curve straight pipe sections, the pipe ends as in 1 to 3 were cut off.

Description of exemplary embodiments

1 purely by way of example shows a perspective view of a plug-in template 1 of the type set forth herein for drawing a particular pipe cutting line 10 on a pipe end 11 , as in 2a and 2 B shown.

The plug-in template 1 of the 1 is made of metal in this example. She has a hard stencil ring 2 on, whose template ring edge 3 for drawing the particular pipe cutting line 10 by means of an attached and guided drawing instrument 13 (S. 2a and 2 B) is trained. The pipe end 11 may purely by way of example have a diameter between 20 cm and 1 m, for example about 30, 40 or 50 cm, wherein also the stencil ring 2 can be dimensioned similarly.

The template ring 2 here represents a pipe section, wherein the stencil ring edge 3 circular in one to the stencil ring axis A (in 1 indicated by a dashed line) is vertical plane. From the template ring edge 3 from three elastic, in particular radial with respect to the stencil ring axis extend in the axial direction A resilient plug-in webs 4 at regular intervals (evenly) along the stencil rim 3 are distributed.

The plug-in bars 4 In this example, they are approximately equal to each other and are on an inner side 5 of the template ring 2 welded on the template ring edge 3 while free to create and guide the drawing instrument 13 remains (s. 2a and 2 B) , Each plug-in bridge 4 has purely by way of example a rectangular hollow cross-section.

To insert the plug-in bars 4 into the pipe end 11 and adjusting an angle between the stencil ring axis required depending on the application A and a pipe end axis (s. 2a and 2 B) to support, points each Einstecksteg 4 starting from the stencil ring edge 3 and alternately a first substantially paraxial web portion 4a , one to the template ring axis A inclined web section 4b and a second substantially paraxial web portion 4c on. At the second axis-parallel web section 4c are also also to support the said functionality as well as for temporary attachment of the stencil ring 2 in front of the pipe end 11 two screws each 6 provided as adjustable fastening means.

2a and 2 B show two examples of side views of the insertion template 1 of the 1 when drawing the particular pipe cutting line 10 on an outer surface 12 of the pipe end 11 , where the template ring 2 by means of the plug-in webs 4 in a suitably adjusted position in front of the pipe end 11 temporarily attached.

As in 2a is clearly visible, is the stencil ring 2 or its template ring axis A - And in this example, the flat circular stencil ring edge 3 - Be positioned and fastened obliquely to the pipe end axis (not shown). For this purpose, the three Einsteckstege 4 each different depths in the pipe end 11 plugged in: at 2a lower and middle insertion bridge 4 is a part of the second axis-parallel web section 4c in front of the pipe end 11 during the second axis-parallel web section 4c of in 2a upper Einsteckstegs 4 completely in the pipe end 11 is lost.

In 2a and 2 B purely exemplary shown tilted end positions of the stencil ring 2 relative to the pipe end 11 can be achieved successively, for example, in the following steps. For example, the screws 6 first so far to the stencil ring axis A be turned out, that the Einsteckstege 4 first with its second paraxial web section 4c on an inside of the pipe end 11 abut, causing the stencil ring axis A can be aligned substantially on the pipe end axis. Individual screws can then be used to set a specific tilt angle 6 be screwed in so far that the respective Einsteckstege 4 now only with screw tips of the screws 6 on the inside of the pipe end 11 abutment and therefore with relatively little effort, for example, by careful hammering, specifically further in the pipe end 11 can be sunk until a required tilt of the template ring 2 is reached over the pipe end axis. In addition, the final position set in this way before drawing the pipe cutting line 10 by a final vigorous tightening of all screws 6 and resulting pressing of all Einsteckstege 4 to the inside of the pipe end 11 be definitively fixed, whereby any shifts in the recording process can be reliably excluded.

The drawing of the pipe cutting line determined in this way 10 by means of the drawing instrument 13 is in 2 B to recognize particularly well, while it in the side view of the 2a shown at the back. The drawing instrument 13 has a spacer in this example 8th in the form of a particular adjustable metallic rod for establishing a constant distance between the stencil ring edge 3 where it is created and the pipe cutting line to be marked 10 on. At the other end of the spacer 8th becomes chalk 9 or a pointed scratched object, so while guiding the drawing instrument 13 along the template ring edge 3 the desired specific pipe cutting line 10 on the outside surface 12 of the pipe end 11 is produced.

3 shows in a side view two merged pipe ends 11 along the as in 2a / 2b marked pipe cutting lines 10 were cut / cut so that the two pipe ends 11 For example, by welding at an angle can be connected together. In this way, in a simple, robust and reliable manner, tubes can curve in curves in principle of any curvature from individual straight tube pieces 7 be moved. An example of this is in 4 shown in perspective.

Claims (15)

Insert template (1) for drawing a specific pipe cutting line (10) on a pipe end (11), comprising: a hard stencil ring (2) whose stencil ring edge (3) is designed to draw a specific pipe cutting line (10) by means of a drawing instrument (13) applied and guided thereon, and - A plurality of elastic Einsteckstege (4) for insertion into the pipe end (11) extending axially from the stencil ring edge (3) and for temporary attachment of the template ring (2) in front of the pipe end (11) are formed. Insert template (1) after Claim 1 in which the insertion webs (4) can be connected or connected to an inner side (5) of the template ring (2) in such a way that the template ring edge (3) remains free to apply and guide the drawing instrument (13). Insert template (1) after Claim 1 or 2 in which the plurality of Einsteckstege (4) two, three, four or more along the template ring edge (3) in particular substantially uniformly distributed Einsteckstege (4). Insertion template (1) according to one of the preceding claims, wherein at least one of the Einsteckstege (4) has a particular substantially rectangular hollow cross-section or is a resilient strip or rod. Plug-in template (1) according to one of the preceding claims, wherein the Einsteckstege (4) are formed such that the template ring (2) in front of the tube end (11) is temporarily fastened in a plurality of different positions, wherein the different positions in particular different angles between a Template ring axis (A) and a Rohrendachse correspond. Insertion template (1) according to one of the preceding claims, in which at least one of the insertion webs (4) at its axial extent from the template ring edge (3) at least one substantially to a template ring axis (A) parallel web portion (4a, 4c) and at least one of Stencil ring axis (A) inclined towards web portion (4b). Insertion template (1) according to one of the preceding claims, in which at least one of the insertion webs (4) has one, two or more adjustable fastening means, in particular screws (6), which are designed for temporary attachment and / or for adjustable positioning of the template ring (2) in front of the tube end (11). Insertion template (1) according to one of the preceding claims, wherein the template ring rim (3) is substantially circular in a plane perpendicular or inclined to a template ring axis (A). Insertion template (1) according to one of the preceding claims, in which the template ring (2) constitutes a pipe section, in particular with an opening cross-section which is essentially the same as that of the pipe end (11). Insert template (1) according to one of the preceding claims, wherein the template ring (2) and / or at least one of the Einsteckstege (4) is made of metal / are. Use of a plug-in template (1) according to one of Claims 1 to 10 for drawing a particular pipe cutting line (10) on a pipe end (11). A method for drawing a specific pipe cutting line (10) on a pipe end (11) by means of a plug template (1) according to one of Claims 1 to 10 method comprising the steps of: - providing a tube having a tube end (11) to be recutted along a particular tube cutting line (10); - Temporarily attaching the template ring (2) of the insertion template (1) in front of the tube end (11), wherein the Einsteckstege (4) are inserted axially into the tube end (11); - drawing the determined pipe cutting line (10) on an outer surface (12) of the pipe end (11) by applying and guiding a drawing instrument (13) to the stencil ring edge (3); - Remove the insert template (1) from the pipe end (11). Method according to Claim 12 in which a certain axial distance of the template ring (2) from the pipe end (11) and / or a certain angle between a template ring axis (A) and a pipe end axis is set during the temporary fastening by means of the insertion webs (4), whereby the specific pipe cutting line (10) is defined. Method according to Claim 12 or 13 wherein the drawing instrument (13) comprises a spacer for defining a particular constant distance between the stencil ring edge (3) and the pipe cutting line (10) to be drawn. A method of laying pipes in a curve, comprising the steps of: providing a plurality of straight pipe pieces (7) to be mutually connected at an angle to form the curve; - Determining suitable oblique pipe cutting lines (10) for pipe ends (11) of each pipe sections to be joined (7); - Drawing the specific pipe cutting lines (10) on outer surfaces (12) of the respective pipe ends (11) according to a method according to one of Claims 12 to 14 ; - Cutting the respective pipe ends (11) along the marked specific pipe cutting lines (10); and - connecting the thus recut pipe ends (11) of the respective pipe pieces (7).

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