EP1108190B1 - Pipe or pipe system for pipeline manifolds, heating circuit manifolds, boiler manifolds and the like - Google Patents

Abstract

The invention relates to a pipe or pipe system for use in so-called pipeline manifolds, heating circuit manifolds, boiler manifolds or similar devices while using pipes having a circular to elliptical or lenticular cross section. At least one dome-like cross section expansion is provided which gives the pipe a partially flat upper surface. This dome-like expansion is open in a circular manner, is provided with a collar in the interior of the pipe, and is optionally provided with an inner threading. A branch pipe comprising an outer threading and an outer beading can be screwed into the inner threading in a sealing manner.

Description

The invention relates to the configuration at least one pipe or pipe system for use in so-called piping, heating circuits or Boiler distributor according to the generic term of Claim 1.

Known components for the above-mentioned assemblies can be found, for example, in DE OS 1 751 893. Here several small branches branch from a main pipe Single pipes from. These single pipes are on the The outer surface of the larger pipe is welded. This Welding prepares a high technical Expenditure. In addition, the weld seams contain a Variety of uncertainties. For one thing, it can Welding come to slag inclusions, the other these welds may not be tight. Other disadvantages are those that may arise Warpage on the components and also optical Impairments.

In another state of the art - the German Document DE 27 07 539 C2 - is, for example Pipe-in-pipe system shown in which the inner pipe serves the inlet, while the outer tube is accordingly provided for the return. Some the branch lines shown there are either only connected to the outer tube while others only are connected to the inner tube. The pipe-in-pipe system is made of square tubes there. The branch pipes are in the main pipes either soldered or welded.

Another state of the art is in the German Disclosure DE-AS 21 16 982 disclosed. After this becomes the tube-in-tube system already described above realized in a different way. On a sheet metal body there are branch pipes. The sheet metal body will at least from one side - from one in essentially open rectangular - cross section enclosed, which in turn also has branches. In addition, this latter body also shows Holes on which a push-through of the branches of the sheet metal body. The other side of the sheet-shaped body is also one rectangular body enclosed, however, this shows for example, no branches. These three Elements are brought together in such a way that a all-round joint consisting of three sheets results that fixes by soldering or welding becomes. The branches of the sheet metal body the surface of the body with the Through holes must also be soldered or be welded.

Another pipe connection is from DE 195 12 024 C2 known. In contrast to DE-AS 21 16 982 (see above) the branches are not welded here. There the branches are threaded first U-shaped channel screwed in. To leak prevent being between the surface of the first Channel and the branch sealing rings used. On second channel is formed by a partition to the Completion of the first channel is attached and a second U-shaped channel is placed on it. Should one branch with the second channel If this connection is connected, this branch takes hold a longer nozzle through the partition. The tightness between the first and the second To ensure the channel, the extended connector points a ring seal. That way come on the Join the upper channel, the lower channel and the Partition together. These parts become mechanical connected by welding them together. This welding in turn leads to warpage and to further, generally known disadvantages of Welding.

Overall, it can be said that from the stand the technology pipe connections or pipe distributor systems are known, however, a variety of Have welded and / or soldered seams.

It is therefore an object of the invention a pipe or Pipe system for pipe distributors, preferably for heating circuit or boiler distributors, to be found at that for connecting individual parts Welding or soldering is largely eliminated and with which the manufacture or assembly becomes cheaper.

This task is accomplished by a pipe or pipe system use in so-called piping, heating circuits or Boiler manifolds and the like. Devices with the Features of claim 1 - in particular the characteristics of the characteristic part - solved; advantageous developments or refinements are by the following claims 2 to 19 disclosed.

The starting point for the invention was the consideration like a connection between a main pipe and a branch pipe that might not look like is welded or soldered. It was known that Welded or soldered connections are therefore carried out be because of a threaded connection between one Tube into the peripheral surface of a larger tube Circular cross section or equivalent cross section not is easily sealed because no level Sealing surfaces are available. Known pipes for such pipe connections are therefore extreme thick-walled, so that sealing surfaces can be machined can be incorporated or worked on; in addition, in usually used as a tube material expensive brass.

Therefore, the invention provides that a thin-walled pipe in the region of a branch, compared to the said pipes, is permanently deformed, flattened, and thus a flat connection point for a branch pipe is created.
This flattening can also take place in a special way in that the larger pipe is not flattened, but rather the larger pipe is expanded in the area of the connection point (branch), that is to say partially over its longitudinal extent.
The dome-like expansion of the cross section of the relevant area or areas of the pipe intended for a branch is an essential new feature of the subject matter of the invention.
If the flat mounting surface thus created on a pipe is broken through, for example by means of non-cutting shaping, and the resulting, preferably inward-facing neck is provided with a thread, a branch pipe, which also has a thread, can be screwed into this opening, until its thread runout, which has a collar, for example, lies against the flat mounting surface.

A further development of the invention also provides that by attaching an outer bead in the end area of the Branch pipe an expanded contact surface between the branch pipe and the one with an enlarged cross section of the larger pipe created flat mounting surface arises. Can between these contact surfaces for example, a sealing ring can be attached, around this connection if necessary e.g. at high Pressing in the pipe system to seal even better.

With the above-mentioned new principle for the connection of the end of a tube via a hole in the outer surface of another tube, which generally has a larger cross section, which is circular to elliptical or lenticular, is a further development of the invention the realization of a pipe-in-pipe system is possible, which does not have the disadvantages of known connections mentioned in the introduction to the description.
In this extension, two pipes, which have one or more breakthroughs according to the invention, are inserted into one another and a connection of the branch pipes to the interior of the respective main pipe is produced by using branch pipes with screw-in pieces of different lengths.
The connection to the space that lies between the outer main pipe and the inner main pipe is achieved with a branch pipe with a short screw-in piece and the connection to the inside of the inner main pipe is achieved with a branch pipe with a long screw-in piece.

Another embodiment of the invention is thermal insulation of pipe-in-pipe systems flowing forward and return flows against each other.

For example, the so-called flow of a heating system flows through the inner main pipe and therefore the return flows in the space between the inner main pipe and the outer main pipe. It makes sense to insert the flow into the inner pipe because the flow is at a higher temperature and is thermally insulated from the outside air by the return flow flowing around the inner main pipe. With these pipe-in-pipe systems, there is a temperature difference between the inner main pipe and the outer main pipe.
In order to minimize the temperature flow between these two pipes, according to another extension of the invention, which is only possible due to the novel connection principle, an insulation layer is applied to the inner main pipe, for example by pushing on a hose made of a rubber-like material (soft foam, eg neoprene) which would be damaged by the welding which is necessary in tube-in-tube systems according to the prior art.

Another, further embodiment of the invention is concerned with the axial connection of the, with dome-like Extensions provided, new main pipe with continuing pipes.

For said axial connections there are already screwable connections which save or avoid weld seams, but with these known screwable connections a thread is required inside the main pipe and a special, complex adapter (nipple) is required as well as an additional union nut on the adapter, which is connected to the external thread of the further pipe.
The further embodiment of the invention is such that the end of the pipe designed according to the invention is adapted, for example reduced, to the connection dimension of the further pipe by non-cutting shaping of the pipe diameter, and after fitting a union nut, also by means of non-cutting shaping, with an outwardly directed collar (flanged edge ) is provided. An optional additional bead between the flanged edge and diameter reduction enables the insertion of a sealing ring.

Another extension of the invention consists in its use in parallel main lines (main pipes) which are not plugged into one another. The branch pipes branch off from the main lines by means of the connection according to the invention (dome-like extensions; branch pipe with bead; screw connection with sealing ring).
These branch pipes have a flexible section between a fixed point - for example a flange screw connection - and their screw connection to the main pipe, which is, for example, a corrugated pipe.
When preassembling such a distribution system, these branch pipes, which are generally quite short and matched to the required length, are first screwed apart from the connection points to the respective main pipe, then each main pipe provided with branch pipes is brought into the area of the connection points and then the still free ends of the branch pipes connected to the relevant connection point. A mounting aid known per se can be assigned to the flanges to make assembly and welding easier.
If a further pipe distributor with main pipe and branch pipes is to be installed, the flanges of which should be in the same plane as that of the first pipe system, the first installed main pipe together with its branch pipes is bent to the side transversely to the longitudinal axis of the main pipe. The second pipe distributor is now assembled in the same way as the first pipe distributor, as previously described. For design reasons, the main line and its branch pipes can also be bent to the side, but now in the other direction. The two systems consisting of a pipe distributor and branch pipes can be flow and return, but they can also be systems with the same flow directions, which are run separately for reasons of circuit division.

Figur 1:

einen erfindungsgemäßen Rohrleitungsverteiler mit drei verschiedenen Ausführungsformen einer domartigen Erweiterungen;

Figur 2:

den Endbereich eines verjüngten Hauptrohres mit nach außen gerichtetem Kragen;

Figur 3a:

den erfindungsgemäßen Rohrleitungsverteiler bei Rohr-In-Rohr-Montage;

Figur 3b:

einen Querschnitt durch den Rohrleitungsverteiler bei Rohr-In-Rohr-Montage;

Figur 3c:

einen Rohrleitungsverteiler bei Rohr-In-Rohr-Montage und strömungstechnischer Verbindung eines Abzweigrohres mit einem inneren Hauptrohr;

Figur 4:

eine weitere Variante der bei Figur 3c beschriebenen Verbindung und

Figur 5:

ein System von Rohrleitungsverteiler, mit separaten Hauptrohren für Vor- und Rücklauf, bei dem die geflanschten Enden der Abzweigrohre, sowohl des Vorlaufes als auch des Rücklaufes, in einer Ebene liegen.

The invention is subsequently explained in more detail with reference to advantageous exemplary embodiments shown schematically in the drawings.
Show it:

Figure 1:

a pipe distributor according to the invention with three different embodiments of a dome-like extensions;

Figure 2:

the end portion of a tapered main tube with the collar facing outward;

Figure 3a:

the pipe distributor according to the invention in pipe-in-pipe assembly;

Figure 3b:

a cross section through the pipe manifold for pipe-in-pipe assembly;

Figure 3c:

a pipe distributor for pipe-in-pipe assembly and fluid connection of a branch pipe with an inner main pipe;

Figure 4:

a further variant of the connection described in Figure 3c and

Figure 5:

a system of pipe distributors, with separate main pipes for supply and return, in which the flanged ends of the branch pipes, both of the supply and the return, lie in one plane.

FIG. 1 shows three different basic forms of a pipe distributor according to the invention. In the middle of the figure, three different tubes 1 can be seen in their longitudinal extent. The section BB through the unchanged pipe cross sections can be seen on the right edge of FIG. On the left edge, the sections of the section line AA through the dome-like extensions 2a, 2b, 2c can be seen. The upper cross section 2a shows an almost rectangular widened cross section.
The figure below shows a U-shaped widened cross section 2b and the lower figure finally shows a barrel widened cross section 2c.
Lines 7 are only intended to indicate the light edges of the deformation. The dome-like extensions 2a, 2b, 2c partly have openings 5, the edges of which are preferably directed into the interior of the tube 1. The openings 5 are provided with a fine thread, not shown.

As can be seen from FIG. 1, the Dome-like extensions 2a, 2b, 2c partly only in the upper tube half 1o and not in the lower Pipe half 1u included, but you can also in be attached to both pipe halves. The latter Variant has the advantage that a possibly arising, one-sided delay with only one-sided non-cutting deformation, is compensated. As part of the Invention is in a two-sided arrangement Dome-like extensions 2a, 2b 2c, not their diametrical (i.e. offset by 180 degrees) Alignment absolutely necessary. It can also ever Different types of dome-like depending on the application Extensions 2a, 2b, 2c available on a tube his.

Around a pipe 1 axially to a further pipe to couple, they have in their end region 1b preferably a reduction in cross section. A postponed after the cross-section reduction Union nut 6 is formed by a non-cutting Collar 1c on the end region 1b of the tube 1 held.

A detailed drawing of the tapered end area 1b of a tube 1 is illustrated in FIG. 2. A union nut 6, not shown, lies on the left on a collar 1c (flanged edge). If the union nut 6, for example by means of a tape-shaped sealing material (hemp fibers, Sealing tape) opposite a further pipe is sealed, so is between the federal government Union nut 6 and the tapered end area Sealing ring 9 required. To record this Sealing ring 9 (for example an O-ring) a bead 8 is formed. However, is the face of the further pipe sufficiently flat, so can also between the right flat surface of the collar 1c and the end face of the further pipe Sealed with the help of a seal 10 (flat seal) become.

The principle of a pipe-in-pipe system is shown in FIG. 3a 11 with the screwable according to the invention Branch pipes 12, 13 shown. The screwable Branch pipes 12 are on the one hand in the outer main pipe 15 screwed in and at the same time in inner main tube 16 inserted. So that can Flow medium only between the inner main pipe 16 and the branch pipes 12 flow. Because the branch pipe 13 is only screwed into the outer main pipe 15 and is at a distance from the inner main tube 16, there is only a flow connection between them both. The screw-in are for sealing Branch pipes 12 both with a seal 9 (for example an O-ring) - the in a bead 4 the neck of the inner main tube 16 is - as also with a seal 9 on the outer main pipe 15 Mistake. So that the sealing ring 9 in the branch pipes 12, 13 has a contact surface, these 12, 13 have one Outer bead 14. Have in this embodiment only the dome-like extensions 2 of the outer Main pipe 15 in its opening 5 a fine thread.

So that at different temperatures Flow media in the inner main pipe 16 and the outer main pipe 15 and the associated different lengths of these Main pipes 15, 16, no noteworthy Longitudinal stresses and associated embrittlement of the material arise, for example, on inner main tube 16 a corrugated tube Pipe section 1d provided.

In general, this pipe-in-pipe system certainly for the realization of a pro and Rewind used. However, it is also conceivable that two rectified flows with different Throughputs and / or different Temperatures are used.

Instead of an O-ring as a seal 9, can also a pasty sealant can be used is preferably set curing.

The pipe-in-pipe system is illustrated in FIG. 3b 11 in cross section with only one outer main pipe 15 screwed branch pipe 13th shown. In addition to those already described elements; here is insulation 17 around the inside Main pipe 16 can be seen. This insulation 17 can be made a hose made of soft foam - for example Neoprene - insist. One may be behind this Other screwable plane Branch pipe 12, was for the sake of Clarity not shown.

Figure 3c illustrates another important one Cross-section through the pipe-in-pipe system 11. Here a screw-in branch pipe 12 can be seen, which with both the inner main tube 16, as well is connected to the outer main pipe 15. Across from 3b here is also the insertion of the screw-in branch pipe 12 in the inner main pipe 16 shown. The dome-like extension 2b has one Bead 4 for receiving a sealing ring 9. The Insulation 17 is around the dome-like extension 2b around for the passage of the screw-in branch 12, spared.

FIG. 4 shows a variant of FIG. 3c described branch illustrated. The Branch pipe 12 is not in the inner main pipe 16 inserted in Figure 3c, but also screwed. This liaison is then not absolutely sealed, but is in a small leak between some applications the inner main pipe 16 and the outer main pipe 15 technically justifiable. A possibly mismatch the thread starts in the dome-like Extension 2b and the branch pipe 12 is through Elasticities in the longitudinal axis of the pipe-in-pipe system 1 balanced.

This embodiment shown in Figure 4 is kind of a "sparing" version of the Pipe system according to the invention for pipe distributors and the like. Devices.

FIG. 5 shows a system of pipeline distributors consisting of two parallel main pipes 1 which are not plugged into one another. The left part of FIG. 5 is a cross section through the system, while the right part of the figure shows a side view. Screw-in branch pipes 13 branch off from two main pipes 1. The branch pipes 13 have flanges 18 at their ends facing away from the main pipes 1. Between the flanges 18 and their screw-in ends, a corrugated pipe-like pipe section 1d is arranged (in the right part of FIG. 5, the corrugated pipe-like pipe section has not been explicitly highlighted; in the left part of FIG. 5, the illustration in the drawing has been greatly simplified). The flanges 18 are all in one plane 22.
In order to manufacture this system of pipe distributors, only one row with branch pipes 13 and the associated main pipe 1 is initially installed. The branch pipes 13 are worked to the appropriate length and screwed into the pipe 1. Then the free ends of the branch pipes 13, here the flanges 18, can each be connected to a connection point, which are not shown in FIG. 5, because the branch pipes 13 now no longer undergo rotation and the flange has a defined position its junction. In addition, the flanges, for example if they are welded to the connection point, can be locked with an assembly aid, not shown.
After the aforementioned steps have been carried out, the pipe 1 together with the branch pipes 13 is then pivoted from the starting position 21 of the plane 22 either in the direction 19 or 20 in order to make room for the assembly of the second main pipe 1 with branch pipes 13. The deformation of the branch pipes 13 when swiveling is plastic.
The second main pipe 1 is assembled in the same way as for the first main pipe 1.
Swiveling is not absolutely necessary for the second main pipe 1, unless one wants to produce a system of pipe distributors with a total of three or even more main pipes 1.
If no pivoting is carried out for the second main pipe 1, the main pipes 1 are so close together that they can be provided, for example, with a common thermal insulation.

LIST OF REFERENCE NUMBERS

1

Main pipes (main line)

1o

upper half of the main pipe 1

1u

lower half of the main pipe 1

1a

Interior of the main pipe 1

1b

tapered end region of the main pipe 1

1c

Collar facing outwards

1d

Corrugated pipe-like pipe section

2

Dome-like extension

2a

rectangular cross section of the dome-like extension

2 B

U-shaped cross section of the dome-like extension

2c

barrel-shaped cross-section of the dome-like extension

3

necking

4

Bead in the neckline

5

opening

6

Nut

7

light edge

8th

Beading

9

poetry

10

Gasket (flat gasket)

11

Pipe-in-pipe system

12

screw-in branch pipes

13

screw-in branch pipes

14

outer bead

15

outer main pipe in the pipe-in-pipe system

16

Inner main pipe in the pipe-in-pipe system

17

insulation

18

flange

19

bending direction

20

bending direction

21

starting position

22

level

Claims (19)

1. Pipe or pipe system for use in so-termed pipe duct distributors, heating circuit distributors or boiler distributors or like devices with use of at least one main pipe with a circular to elliptical or lens-shaped cross-section and at least one branch pipe branching to a branch from the main pipe, characterised in that the main pipe (1) or the main pipes (1) used for a pipe system has or have in the region of the branch at least one cross-sectional enlargement (2, 2a, 2b, 2c) in at least in the upper half (1o) or lower half (1u) resulting from a notional horizontal pipe longitudinal section, that this cross-sectional enlargement has a radially directed opening (5) and that this opening (5) has a neck extension (3) directed towards the interior (1 a) of the pipe.
2. Pipe or pipe system according to claim 1, characterised in that the cross-sectional enlargement (2) has a substantially rectangular cross-section (2a).
3. Pipe or pipe system according to claim 1, characterised in that the cross-sectional enlargement (2) has substantially U-shaped cross-section (2b).
4. Pipe or pipe system according to claim 1, characterised in that the cross-sectional enlargement (2, 2a, 2b, 2c) has a substantially barrel-shaped cross-section (2c).
5. Pipe or pipe system according to one of claims 1 to 4, characterised in that the different forms of cross-sectional enlargements (2, 2a, 2b, 2c) are provided in one pipe (1).
6. Pipe or pipe system according to one of claims 1 to 5, characterised in that the cross-sectional enlargements (2, 2a, 2b, 2c) point in different radial directions with respect to the longitudinal axis of the pipe (1).
7. Pipe or pipe system according to one of claims 1 to 6, characterised in that the cross-sectional enlargements (2, 2a, 2b, 2c) each have a fine thread in the neck extension (3) of the respective opening.
8. Pipe or pipe system according to one of claims 1 to 6, characterised in that the cross-sectional enlargements (2, 2a, 2b, 2c) each have a corrugation (4) in the neck extension (3) of the respective opening.
9. Pipe or pipe system according to one of claims 1 to 8, characterised in that the branch pipes (12, 13) able to be screwed in are screwed into the neck extension (3) of the cross-sectional enlargements (2, 2a, 2b, 2c).
10. Pipe or pipe system according to one of claims 1 to 9, characterised in that, for realisation of a pipe system consisting of at least two mutually parallel main pipes (1), branch pipes (13) able to be screwed in each have a corrugated pipe length portion (16) and the ends, which are remote from the main pipes (1), of the branch pipes (13) able to be screwed in lie in one plane (22).
11. Pipe or pipe system according to one of claims 1 to 10, characterised in that a respective sealing ring (9) is arranged between the contact surface, which is formed at the main pipe (1) at the receptacle (2, 3, 5), and the screwed-in branch pipe (12; 13).
12. Pipe or pipe system according to one of claims 1 to 11, characterised in that a respective sealing mass is arranged between the contact surface, which is formed at the main pipe (1) at the receptacle (2, 3, 5), and the screwed-in branch pipe (12; 13).
13. Pipe or pipe system according to one of claims 1 to 12, characterised in that the pipe branches (12, 13) able to be screwed in have an outer corrugation (14).
14. Pipe or pipe system according to one of claims 1 to 13, characterised in that, for realisation of a pipe-into-pipe system, an inner main pipe (16) is introduced into an outer main pipe (15) and branch pipes (12; 13) able to be screwed in are screwed at least into the openings (5) of the outer main pipe (15) and the branch pipes (12) able to be screwed in have a flow connection only to the inner main pipe (16).
15. Pipe or pipe system according to claim 14, characterised in that the inner pipe (16) has at least one corrugated pipe length portion (1d).
16. Pipe or pipe system according to one of claims 14 and 15, characterised in that the inner main pipe (16) is coated at least partly with a thermally insulating layer.
17. Pipe or pipe system for use in so-termed pipe duct distributors, heating circuit distributors or boiler distributors or like devices with use of pipes with a circular to elliptical or lens-shaped cross-section, characterised in that at least one of the end regions of the pipe (1) is provided with a collar (1c).
18. Pipe or pipe system according to claim 17, characterised in that the end region of the main pipe (1) has a narrowed end region (1b).
19. Pipe or pipe system according to one of claims 17 and 18, characterised in that a corrugation (8) for receiving a seal (9) is formed in front of the collar (1c) of the end region of the pipe (1).

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