EP1108190A1

EP1108190A1 - Pipe or pipe system for pipeline manifolds, heating circuit manifolds, boiler manifolds and the like

Info

Publication number: EP1108190A1
Application number: EP99950521A
Authority: EP
Inventors: Albert Werlein
Original assignee: Werlein Albert
Current assignee: Straub Hans
Priority date: 1998-08-14
Filing date: 1999-08-13
Publication date: 2001-06-20
Anticipated expiration: 2019-08-13
Also published as: ATE228227T1; EP1108190B1; DE29924006U1; WO2000009953A1

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

Pipe or pipe system for pipe distributors, heating circuit distributors, boiler distributors and the like.

description

The invention relates to the design of at least one pipe or a pipe system for use in so-called pipe, heating circuit or boiler distributors according to the preamble of claim 1.

Known components for the above-mentioned assemblies can be found, for example, in DE OS 1 751 893. Here, several small individual pipes branch off from a main pipe. These individual tubes are welded to the outer surface of the larger tube. This welding involves a high technical outlay. In addition, the weld seams involve a large number of imponderables. On the one hand, there may be slag inclusions during welding, on the other hand, these weld seams may not be tight. Other disadvantages are the possible distortion of the components and also visual impairments.

Another prior art - the German document DE 27 07 539 C2 - shows, for example, a pipe-in-pipe system, in which the inner pipe is used for the inlet, while the outer pipe is then correspondingly provided for the return. Some the branch lines shown there are either only connected to the outer tube, while others are only connected to the inner tube. The tube-in-tube system is made of square tubes. The branch pipes are either soldered or welded into the main pipes.

A further state of the art is disclosed in DE-AS 21 16 982. After this, the pipe-in-pipe system already described is implemented in a different way. Branch pipes are located on a sheet metal body. The sheet metal body is enclosed at least from one side - by an essentially open rectangular cross section, which in turn also has branches. In addition, this latter body also has bores which allow the branches of the sheet-metal body to be pushed through. The other side of the sheet-metal body is enclosed by a likewise rectangular body, but this has no branches, for example. These three elements are brought together in such a way that there is a continuous joint consisting of three sheets, which is fixed by means of soldering or welding. The branches of the sheet-metal body on the surface of the body with the through holes must also be soldered or welded. Another pipe connection is known from DE 195 12 024 C2. In contrast to DE-AS 21 16 982 (see above), the branches are not welded here. There, the branches are screwed into the thread of a first U-shaped channel. To prevent leakage, sealing rings are used between the surface of the first channel and the branch. A second channel is formed by attaching a partition to the end of the first "channel and a second U-shaped channel is placed on it. However, if a branch is to be connected to the second channel, this branch extends through the partition with a longer connecting piece In order to ensure the tightness between the first and the second channel, the extended connecting piece has an annular seal, in this way the upper channel, the lower channel and the partition wall come together at the joint. These parts are mechanically connected to one another by they are welded, which in turn leads to warpage and the other well-known disadvantages of welding.

Overall, it can be stated that pipe connections or pipe distributor systems are known from the prior art, but which have a large number of welded and / or soldered seams.

It is therefore an object of the invention, preferably a pipe or pipe system for pipe distributors for heating circuit or boiler distributors, where the _. Connecting individual parts, welding or soldering is largely eliminated and with which the production or assembly becomes more cost-effective.

This object is achieved by a pipe or pipe system for use in so-called pipe, heating circuit or boiler distributors and the like. Devices with the features of claim 1 - in particular by the features of the characterizing part; Advantageous further developments or refinements are disclosed by the following claims 2 to 19.

The starting point for the invention was the idea of what a connection point between a main pipe and a branch pipe could look like that is not welded or soldered. It was known that welded or soldered connections are made because a threaded connection between a pipe in the peripheral surface of a larger pipe with a circular cross section or equivalent cross section is not easily sealed because there are no flat sealing surfaces. Known pipes for such pipe connections are therefore made extremely thick-walled so that sealing surfaces can be machined or machined; In addition, expensive brass is generally used as the pipe material. 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 region of the connection point (branch), that is to say partially over its longitudinal extent.

The dome-like widening 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 this flat mounting surface on a pipe is created, e.g. by means of non-cutting reshaping, pierced and the resulting, preferably inwardly directed necking provided with a thread, a branch pipe, which also has a thread, can be screwed into this opening until its thread outlet, e.g. has a collar against which the flat mounting surface rests.

A further development of the invention also provides that by attaching an outer bead in the end region of the branch pipe, an enlarged contact surface between the branch pipe and the flat mounting surface created in the enlarged cross section of the larger pipe arises. A sealing ring can, for example, be attached between these contact surfaces in order to seal this connection even better if necessary, for example at high pressures in the pipe system.

With the above-mentioned new principle for the connection of the end of a tube via a hole in the lateral surface of another tube, which generally has a larger cross section, which is circular to elliptical or lenticular, is a further extension of the invention the realization of a pipe-in-pipe system 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, which 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 the thermal insulation of the flow and return flows flowing in pipe-in-pipe systems.

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. These pipe-in-pipe systems there is a Temperaturdif ^¬ ference between the inner main tube and the outer Hauptröhr.

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 new main pipe provided with dome-like extensions to further 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 in addition a special, complex adapter (nipple) and 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 the diameter reduction enables the insertion of a sealing ring.

Another extension of the invention consists in its application to 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 between a fixed point - For example, a flange screw connection - and its screw connection to the main pipe a flexible section, 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 length required, are first screwed to the respective main pipe apart from the connection points, 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 facilitate assembly and welding.

If a further pipe distributor with a 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 and its branch pipes are bent sideways 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 constructional 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 also systems with act in the same flow directions, which are performed separately for reasons of circuit division.

The invention is based on illustrated schematically in drawings explained ^¬ advantageous embodiment examples. Show it:

Figure 1: a piping system 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 distributor in pipe-in-pipe assembly;

Figure 3c: a pipe distributor in pipe-in-pipe assembly and fluid connection of a branch pipe with an inner main tube;

Figure 4: a further variant of the connection described in Figure 3c and Figure 5: a system of pipe distributor, with separate main pipes for upstream and downstream

Return, in which the flanged ends of the branch pipes, both of the flow 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. Section B-B through the unchanged pipe cross sections can be seen on the right edge of FIG. The sections of the section line A-A through the dome-like extensions 2a, 2b, 2c can be seen on the left edge. 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. Some of the dome-like extensions 2a, 2b, 2c 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 are partly only in the upper tube half 10 and not in the lower one Pipe half lu included, but they can also be attached in both pipe halves. The latter variant has the advantage that a possibly occurring one-sided distortion with only one-sided non-cutting deformation is compensated for. In the context of the invention, in the case of a two-sided arrangement of the dome-like extensions 2a, 2b 2c, their diametrical (ie offset by 180 angular degrees) alignment is not absolutely necessary. Depending on the application, different types of dome-like extensions 2a, 2b, 2c can also be present on a tube.

In order to axially couple a pipe 1 to a further pipe, these preferably have a cross-sectional reduction in their end region 1b. A union nut 6 pushed on after the reduction in cross-section is held on the end region 1b of the tube 1 by a collar 1c which is formed without cutting.

A detailed drawing of the tapered end region 1b of a tube 1 is illustrated in FIG. 2. A union nut 6, not shown, rests on the left side of a collar lc (flanged edge). If the union nut 6 is sealed against a further pipe, for example by means of a band-shaped sealing material (hemp fibers, sealing tape), there is a between the collar of the union nut 6 and the tapered end region Sealing ring 9 required. To accommodate this sealing ring. 9 (for example an O-ring) a bead 8 is formed. However, if the end face of the further pipe is sufficiently flat, a seal 10 (flat gasket) can also be used to seal between the right flat surface of the collar 1c and the end face of the further pipe.

The principle of a pipe-in-pipe system 11 with the branch pipes 12, 13 which can be screwed in according to the invention is shown in FIG. 3a. The screw-in branch pipes 12 are screwed into the outer main pipe 15 and at the same time inserted into the inner main pipe 16. Thus, the flow medium can only flow between the inner main pipe 16 and the branch pipes 12. Since the branch pipe 13 is only screwed into the outer main pipe 15 and is at a distance from the inner main pipe 16, there is only a flow connection between the two. The screw-in are for sealing

Branch pipes 12 both with a seal 9

(For example, an O-ring) - which lies in a bead 4 of the neck of the inner main tube 16 - and also provided with a seal 9 on the outer main tube 15. So that the sealing ring 9 has a bearing surface on the branch pipes 12, 13, these have an outer bead 14, 13. In this exemplary embodiment, only the dome-like extensions 2 of the outer main pipe 15 have a fine thread in their opening 5. A corrugated pipe-like pipe section 1d is provided on the inner main pipe 16, for example, so that no significant longitudinal stresses and associated embrittlement of the material occur at different temperatures of the flow media in the inner main pipe 16 and the outer main pipe 15 and the associated different longitudinal expansions of these main pipes 15, 16.

In general, this pipe-in-pipe system is certainly used for the realization of a forward and return flow. However, it is also conceivable that two rectified flows with different throughput quantities and / or different temperatures are used.

Instead of an O-ring as a seal 9, a pasty sealing compound can also be used, which is preferably set to harden.

For illustration, the pipe-in-pipe system 11 is shown in cross section in FIG. 3b with a branch pipe 13 screwed only into the outer main pipe 15. In addition to the elements already described, insulation 17 around the inner main pipe 16 can be seen here. This insulation 17 can consist of a hose made of soft foam - for example neoprene. One may be behind this Other screwable branch pipe 12 located on the cutting plane has not been shown for reasons of clarity.

FIG. 3c illustrates another important cross section through the pipe-in-pipe system 11. Here, a screw-in branch pipe 12 can be seen, which is connected both to the inner main pipe 16 and to the outer main pipe 15. Compared to FIG. 3b, the insertion of the screw-in branch pipe 12 in the inner main pipe 16 is also shown here. The dome-like extension 2b has a bead 4 for receiving a sealing ring 9. The insulation 17 is recessed around the dome-like extension 2b for the passage of the screw-in branch 12.

FIG. 4 illustrates a variant of the branch described in FIG. 3c. The branch pipe 12 is not inserted into the inner main pipe 16 as in FIG. 3c, but is also screwed in. Although this connection point is then not necessarily absolutely sealed, in some applications a slight leakage between the inner main pipe 16 and the outer main pipe 15 is technically justifiable. A possible mismatching of the thread starts in the dome-like extension 2b and the branch pipe 12 is compensated for by elasticities in the longitudinal axis of the pipe-in-pipe system 1. This exemplary embodiment shown in FIG. 4 is to a certain extent a "saving" version of the pipe system according to the invention for pipe distributors and similar devices.

FIG. 5 shows a system of pipeline distributors consisting of two parallel main pipes 1 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 both 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; the drawing in the left part of FIG. 5 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 experience rotation and the flange has a defined position to its connection point. 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 above 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.

Reference list

1 main pipes (main pipe) lo upper pipe half of the main pipe 1 lu lower pipe half of the main pipe 1 la interior of the main pipe 1 lb tapered end area of the main pipe 1 lc collar, directed outwards ld corrugated pipe-like pipe section

2 dome-like extension

2a rectangular cross section of the dome-like

extension

2b U-shaped cross section of the dome-like

extension

2c barrel-shaped cross-section of the dome-like

extension

3 Necking 4 Beading in the necking 5 Opening 6 Union nut 7 Light edge

Surround

9 seal

10 gasket (flat gasket)

11 Pipe-in-pipe system

12 screw-in branch pipes

13 screw-in branch pipes

14 outer beads

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

claims

1. Pipe or pipe system for use in so-called pipe, heating circuit or boiler distributors or the like. Devices using pipes with a circular to elliptical or lenticular cross-section,

characterized,

that the main pipe (1) or the main pipes (1) used for a pipe system, at least in the upper (lo) or in the lower (lu) pipe half, which are caused by an imaginary horizontal pipe longitudinal cut, at least one

Cross-sectional widening (2, 2a, 2b, 2c) has that this cross-sectional widening (2, 2a, 2b, 2c) has a radially directed opening (5) and that this opening (5) has an interior (la) of the tube (1) has facing neck (3).

2. Pipe or pipe system according to claim 1,

characterized,

that the cross-sectional widening (2) has a substantially rectangular cross-section (2a).

Pipe or pipe system according to claim 1,

characterized,

that the cross-sectional extension (2) has a substantially U-shaped cross-section (2b).

4. Pipe or pipe system according to claim 1,

characterized,

that the cross-sectional expansion (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,

characterized,

that various cross-sectional extensions (2, 2a, 2b, 2c) are provided in a tube (1).

6. Pipe or pipe system according to one of claims 1 to 5,

characterized,

that the cross-sectional expansions (2, 2a, 2b, 2c), in relation to the longitudinal axis of the tube (1), point in different radial directions.

7. Pipe or pipe system according to one of claims 1 to 6,

characterized,

that the cross-sectional extensions (2, 2a, 2b, 2c) have a fine thread in the neck (3) of their respective opening (5).

Pipe or pipe system according to one of claims 1 to 6,

characterized,

that the cross-sectional enlargements (2, 2a, 2b, 2c) have a bead (4) in the neck (3) of their respective openings (5).

Pipe or pipe system according to one of claims 1 to 8,

characterized,

that branch pipes (12, 13) which can be screwed in are screwed into the neckings (3) of the cross-sectional ^enlargements (2, 2a, 2b, 2c).

10. Pipe or pipe system according to one of claims 1 to 9,

characterized,

that to realize a pipe system consisting of at least two mutually parallel main pipes (1), screw-in branch pipes (13) each have a corrugated pipe-like pipe section (lb) and facing away from the main pipes (1)

The ends of the screw-in branch pipes (13) lie in one plane (22).

11. Pipe or pipe system according to one of claims 1 to 10,

characterized, that a sealing ring (9) is arranged between the contact surface formed on the main pipe (1) on 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,

characterized,

that a sealing compound is provided between the contact surface formed on the main pipe (1) on 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,

characterized,

that the screw-in pipe branches (12, 13) have an outer bead (14).

14. Pipe or pipe system according to one of claims 1 to 13,

characterized, that in order to implement a pipe-in-pipe system (11), an inner main pipe (16) is introduced into an outer main pipe (15) and screw-in branch pipes (12; 13) at least in the openings (5) of the outer main pipe (15 ) are screwed in and the screw-in branch pipes (12) only have a flow connection to the inner main pipe (16).

15. Pipe or pipe system according to claim 14,

characterized,

that the inner main pipe (16) has at least one corrugated pipe-like pipe section (ld).

16. Pipe or pipe system according to one of claims 14 or 15,

characterized,

that the inner main tube (16) is, at least partially, covered with a heat-insulating layer.

17. Pipe or pipe system for use in so-called pipe, heating circuit or Boiler distributors or similar devices using tubes with circular to elliptical or lenticular cross-section,

characterized,

that at least one of the end regions of the tube (1) is provided with a collar (lc).

18. Pipe or pipe system according to claim 17,

characterized,

that the end region of the main pipe (1) is a tapered end region (lb).

19. Pipe or pipe system according to one of claims 17 or 18,

characterized,

that in front of the collar (lc) of the end region of the tube (1), a bead (8) for receiving a

Seal (9) is attached.