DE19610206A1 - Pipe conduit and installation system for heating installations - Google Patents

Abstract

The pipe conduit system is for central heating installations, storey heating, floor heating and for cold and hot water supply installations in a building. The free ends of the corrugated pipe can be edged and using half-shell type threaded flange pieces (36a,36b) or using half-rings (30a,30b) can be connected in a pressure-tight manner with the ends of further corrugated pipes (2) or with components of the heating or water supply installation. The ratio between the length of the corrugation peak (4) to the corrugation valley (6) of the corrugated pipe is especially less than 1. It may also be greater than 1. The pipe is made of metal and is encased in a plastics hose, which is fibre-reinforced.

Description

The invention relates to a pipeline and installation system, especially for central heating systems and Floor heating, for underfloor heating, and for cold and Hot water pipes, consisting of at least one Pipe element.

I. Pipe laying with iron and copper pipes

Conventionally, for such Pipe laying rigid pipes made of iron or copper for Commitment.

It was with the previously used gravity heaters usual, relatively large dimensions, predominantly vertical too to install laying iron pipes.

Such pipe systems were not only cumbersome and elaborate to assemble, but they were because of their size and ugliness to look ugly.

When converting solid fuel boilers with your relatively smooth operation and accordingly uniform temperature on automatic oil and gas boilers with their interval operation and the associated Temperature fluctuations occur periodically  Elongation and contraction, which in turn Cracking noises, especially at the attachment points and on the wall openings.

In contrast to gravity heating systems, they are modern Heating systems usually operated with a circulation pump (s). The pipelines can be relatively small Have cross-section and predominantly laid horizontally will. Especially when converting furnace heaters on oil or gas central heating or floor heating in Old buildings, when furnishing condominiums with separate floor heating, etc. come skirting board pipe systems for use. As a rule, copper pipes - with or without plastic coating - installed. The installation pipe systems of this type represent a considerable one Simplification compared to the installation of the pipe system a gravity heater. For example, on Ceiling openings are largely avoided. Also provide those that can be installed both under plaster and on plaster thin tubes are not a problem aesthetically Consideration, however, is still subject to numerous criticisms record: The laying of such pipes requires great skilled craftsmanship. In contrast to electrical cables the conventional water pipes are rigid, so that there is a one-piece flexible laying around corners and edges prohibits. When laying in corners of the room to Wall protrusions, in niches, etc. is a pipe denomination can not be avoided. Because of the rigidity they have to Pipe ends precisely cut to the appropriate length will. The connection is then made with elbows, Sleeves etc. to be soldered to the ends of the pipes. The rigid tubes are subject to that for the respective Material given coefficient of thermal expansion. Will the Assembly is not carried out properly, so there is at  conventional baseboard pipe systems, similar to the Pipe systems of those converted to interval operation Gravity heaters, the risk of cracking noises due to temperature jumps.

Usually radiators are in the under windows installed niches installed, the to these Pipelines leading along the radiators related outer walls are installed.

Because the outer walls, especially of non-thermally insulated Old buildings that are most exposed to outside temperatures exists with such pipes laid on the outer walls Risk of freezing. Freezing massive pipes get "thick Bake "and burst open. This not only results in a damage in the piping system, but it is with it consequential damage, such as B. ruined parquet and others Water damage to consider.

The piping systems for heating systems The problems mentioned also occur in a similar form Piping systems for hot or cold water.

II. Corrugated pipes and processing methods for corrugated pipe Endless goods

Corrugated pipes of various types are known per se. So far, it has been difficult to process continuous goods of such corrugated pipes at the respective assembly point. In particular, the connection of cut corrugated pipe ends to flanges or sleeves has not previously been easily possible. For this reason, it has so far been limited to using corrugated pipes only as intermediate or fitting pieces between the ends of two inflexible pipes. For this purpose, the corrugated pipe pieces are provided with smooth ends (pipe sockets), to which pipe sockets can be attached as connecting pieces (e.g. DE-32 11 027: pipe sockets ( 25 ) and ( 26 ); DE-34 24 704: Pipe socket ( 11 ) and ( 12 ); DE-43 42 597: cylindrical ends ( 2 ), ( 3 ); DE-24 52 104: non-corrugated hose area ( 11 ), ( 12 ) at both ends). From this it can be seen that the corrugated pipes mentioned are not intended and are not suitable for processing as continuous goods (by the meter).

Except for adapters, the use of corrugated pipes has so far been largely limited to use as expansion pieces. For example, B. DE-26 20 334 an automatically guided axial compensator, in which a corrugated tube serves as an expansion element. DE-25 44 453 describes an equalizer for pipes using a corrugated casing ( 4 ). DE-31 18 238 is about a pipe compensator for a pipe into which hot media should be transportable.

The problem of the pressure tight connection of Corrugated tube by the meter with flanges and the like is currently only solved unsatisfactorily.

DE-28 03 329 describes a butt joint between with a corrugated corrugated pipe bellows and a pipe flange one applying an axial preload Connection device, which with a radially outside to the radially inward sloping surface a wave engages behind the bellows and against a wave flank presses a counter surface on the flange. Because the self-elastic Pressure decreases with time and because of that the Sealing is at risk, will also be angled Counter surface suggested. With the help of a clamping device then several waves of the bellows should form a wedge-shaped compressed section. To one  Achieving reliable tightness continues proposed the ring waves in the foot area with a fill in incompressible, permanently plastic filling compound. The effort involved has not turned out to be special proven practicable.

To ensure a reliable connection of corrugated pipe goods To enable pipe flanges, according to DE-30 01 666 proposed to end the corrugated tube with gas-tight welded flanges to provide, the flange on a beveled side facing the end of the corrugated pipe Bevel. Around the corrugated pipe with the flange on the front by means of arc welding to be carried out under protective gas To be able to connect, it is first necessary that the The corrugated pipe end to be welded is previously formed on the chamfer becomes. For this, the corrugated pipe end must be covered with a special Pliers removed and at the same time by 15 ° to 45 ° against the pipe axis using a calibration form be calibrated. All of this requires extensive Tool set consisting of a decurling pliers with parallel jaw guide with according to the respective Pipe diameter curved jaws, a two-part Calibration form with internal thread and one of the chamfers on Corresponding chamfer, as well as a calibration mandrel a chamfer, which is also the chamfer on the flange corresponds.

Apart from the fact that that described in DE-30 01 666 Method of flanged corrugated pipe ends intended only for helically corrugated pipes the extensive work with the numerous special tools in addition to the processes of Arc welding under inert gas in no way Trend to quick assembly technology.

The object of the invention is to avoid the problems described, a piping system, or a Pipe laying system, especially for central heating systems and floor heating, for underfloor heating and for warm and to describe cold water pipes, which with low material costs and an easy one Processing and thus quick installation possible.

In a generic piping or routing system is the solution to this problem with the distinctive Features of claim 1 given. Beneficial Further training results from the subclaims.

The inventive idea can essentially be seen in that a piping system, especially for Central heating systems and floor heating, for Underfloor heating, and for cold and hot water pipes, is formed from corrugated tubes, or that parallel corrugated pipes such a piping system form.

Such as yard goods made of metal, mainly from Stainless steel, corrugated pipes can be made in any kind, whether under plaster, as a baseboard system or in special supply shafts easily and simply embarrassed. Because of their longitudinal elasticity, none of them are conventional rigid heating and hot water pipes to fear known cracking noises. Also put the Corrugated pipes are aesthetically no problem, because they can be without Concerns under plaster or under cover strips Skirting board system can be installed.

Since heating systems now almost without exception Circulation pumps can be operated, the ones to be installed  Corrugated pipes have a small cross section and also are mainly laid horizontally.

In contrast to the previously used, rigid to Laying iron or copper pipes is a one-piece Laying the corrugated tube goods easily around corners and Edges possible. The corrugated pipes of the invention Corrugated pipe laying systems are so flexible that it - comparable to an electrical cable - with extremely little Radius laid in corners and around ledges can be. On the laying of rigid pipes known angles, sleeves, adapters, etc. can to be dispensed with.

The corrugated pipe also does not need to be precise to the lengths of the straight sections to be cut because it leaves not only bend around corners and edges, but also it can also be stretched to a certain extent or compress, so that with the respective cut also millimeter-accurate dimensions can be dispensed with. Separate expansion compensation pieces are completely eliminated. Also there is no need for soldered or welded connections, because the cut and flanged corrugated pipe ends just be screwed.

In contrast to rigid iron or copper pipes, they are Corrugated pipes so elastic that they freeze the survive water contained therein without consequential damage.

Overall, corrugated pipes have compared to conventional Iron and copper pipes despite a considerable one Material saving a great stability. Due to the they are considerably smaller wall thickness of the corrugated pipes cheaper because of the lower material requirements  producible. Also arise because of the comparable lower weight lower transport costs. The Corrugated pipes are available by the meter in any lengths Rolls available. The corrugated pipes of the piping system have surprisingly good flow properties: The Waves of waves fill with eddies while in the otherwise clear width a largely laminar, can form low-resistance flow.

Especially for cold and hot water pipes, and for This is central heating systems and floor heating Ratio of lengths from Wellenberg to Wellental des parallel corrugated tube preferably smaller than 1. On this way you get without additional applied insulation material excellent thermal insulation: Because of the turbulence in the wave crests, here results a cooling down to one between the ambient and Average temperature lying inside, whereby the Heat loss at the wave crests is extremely low.

For the use of the corrugated pipes as underfloor heating the ratio of the lengths from Wellenberg to Wellental preferably greater than 1.

This ensures that the wave crests are complete be flushed out by the heated flow water and in this way a heat transfer is achieved which is that of conventional plastic coils are known by far surpasses.

In contrast to underfloor heating Plastic pipe coils has the inventive Pipe laying system made of corrugated stainless steel pipes practical no corrosion. There is no delivery of substances to  the liquid medium. Overall is a big one Durability to be expected. Signs of aging and The material becomes fragile like plastic Endless stainless steel corrugated pipes not to be feared.

A sheathing of the stainless steel corrugated pipe with a Plastic tubing provides additional protection aggressive chemicals and mechanical injuries to the Tube. In addition, it stands between the Air troughs and the plastic jacket additional element for thermal insulation. It is relatively insignificant that the plastic jacket on the Wave crests of the corrugated pipe are tight, because the through the swirling of relatively cold wave peaks only give in insignificant amount of heat energy to the environment.

A coated corrugated pipe can be easily used without further Lay measures under plaster. In particular one in Longitudinal fiber-reinforced plastic sheathing results additional compressive rigidity in the axial direction.

To ensure optimal heat transfer in underfloor heating ensure is a plastic jacket around that Corrugated pipe preferably tight-fitting, e.g. B. in the form of a To form shrink tubing. As for corrugated pipes for Floor heating systems have no longitudinal loads are, it is completely sufficient for underfloor heating provided corrugated pipes only with a protective varnish Mistake.

The invention will be explained in more detail below with the aid of figures described.

It shows:  

Fig. 1 shows a longitudinal section through a parallel-corrugated tube piece;

Figure 2 also shows a longitudinal section through a parallel corrugated pipe with plastic sheathing.

FIG. 3a shows a misplaced in a conventional manner by a ledge rigid tube;

FIG. 3b is a misplaced by an equal projecting wall corrugated pipe;

Fig. 4 is provided with a union nut corrugated tube end;

Fig. 5 is a provided with two half-shell pieces of corrugated threaded pipe end.

The longitudinal section shown in Fig. 1 shows a parallel corrugated tube (corrugated tube) 2 with a wavelength E, which is composed of the length of the "wave crest" F and the length of the "wave trough" G. The total pipe diameter is specified with øB; the inner tube diameter - after deduction of the shaft height C - is øA. The wall thickness of the tube 2 is marked with D. The slope of the waves is characterized by the angle I.

Since the pipe 2 shown in FIG. 1 has no sheathing, there is good heat transfer to the surroundings. This pipe 2 is therefore particularly suitable for use as underfloor heating.

The section of a corrugated tube 2 shown in longitudinal section in FIG. 2 has relatively short wave crests 4 and relatively long wave troughs 6 . This corrugated tube 2 is encased by a plastic tube 8 . When flowing through the tube 2 with the heat transfer medium (water) 10 , a largely laminar flow 10 a results in the clear width, while the wave crests 4 are largely filled with vortices 10 b. There is practically no transport of the medium 10 in the top of the wave crests 4 . This results in a more or less severe cooling. For this reason, there is only a relatively low heat transfer at the tips of the wave crests 4 .

In the area of the relatively long wave troughs 6 , the heat transfer is also low, since there is an extensive air cushion 12 between the wave troughs 6 and the plastic tube sheath 8 .

The pipe laying shown as a plan in FIGS . 3a and 3b, arranged around a wall projection 14 , shows how cumbersome the conventional laying ( FIG. 3a) is in comparison to a laying with corrugated pipe continuous goods 2 . For the installation for only a single ledge 14 when using conventionally rigid tubes 18 five straight tube sections 20 are in total a, 20 b. . . and four angles 22 a, 22 b,. . . needed. The tube ends 20 a, 20 b,. . . must be tailored precisely. A total of eight solder joints 24 are required for the connection.

When using corrugated tube continuous goods 2 , no denomination is required. There are also no angles 22 or other pipe sockets and therefore no solder joints 24 . The corrugated tube 2 can be flexibly laid in a single piece around the wall projection 14 ( FIG. 3b).

The corrugated tube 2 shown in FIG. 4 is flanged at its end 26 , so that a flat sealing surface 28 results. One of the last wave troughs 6 is equipped with two half rings 30 a, 30 b after the corrugated tube end 26 has previously been provided with a union nut 32 . A washer 34 can be placed on the sealing surface 28 . The corrugated pipe end 26 is thus prepared for screw mounting on a heating component or on a further pipe end 26 with a corresponding counterpart.

Instead of the two half-rings 30 a, 30 b in conjunction with a union nut 32, the corrugated tube end 26 with two half-shell thread pieces 36 a, 36 b for the purpose of connectivity with other pipe ends 26 are provided, wherein the two half-shell thread pieces 36 a, 36 b a projecting edge 38 , which find resistance in one of the last wave troughs 6 ( FIG. 5).

Reference list

2 parallel corrugated tube (corrugated tube)
E wavelength
F length of wave crest
G length trough
øA inner tube diameter
øB (total) pipe diameter
C wave height
D wall thickness of the pipe
I slope of the waves
4 wave crest
6 trough
8 plastic hose
10 heat transfer medium (water) or medium to be transported
10 a laminar flow
10 b vertebrae
12 air cushions
14 wall protrusion
16 continuous corrugated pipe goods
18 rigid tube
20 a, b 20. . . straight pipe ends
22 a, b 22. . . angle
24 solder joints
26 corrugated pipe end
28 flat sealing surface (flanged edge)
30 a, 30 b half rings
32 union nut
34 sealing ring (washer)
36 a ( 36 b) half-shell threaded piece (flange)
38 protruding edge

Claims (9)

1. Pipe and laying system, in particular for central heating systems and floor heating systems, for underfloor heating and for cold and hot water pipes, consisting of at least one pipe element, characterized in that the pipe element is a parallel corrugated pipe ("corrugated pipe") ( 2 ), which can be produced from corrugated tube endless or meter goods ( 16 ),

• - The continuous goods ( 16 ) can be cut to any length and flexibly laid,
• - The free ends ( 26 ) of the corrugated tube ( 2 ) can be flanged, and
• - The flanged ends ( 26 ) by means of half-shell threaded pieces (flanges) ( 36 a), ( 36 b) or by means of half rings ( 30 a), ( 30 b) with the ends ( 26 ) of further corrugated pipes ( 2 ) or with components of Heating or water supply system can be connected pressure-tight.

2. Pipe and laying system, in particular for central and floor heating and for cold and hot water pipes according to claim 1, characterized in that the ratio of the lengths of wave crest ( 4 ) to trough ( 6 ) of the corrugated pipe ( 2 ) is less than 1 is. 3. Pipe and laying system, in particular for underfloor heating, according to claim 1, characterized in that the ratio of the lengths of wave crest ( 4 ) to trough ( 6 ) of the parallel corrugated pipe ( 2 ) is greater than 1. 4. Pipe and laying system according to one of claims 1-3, characterized in that the corrugated tube ( 2 ) consists of metal and is sheathed with a plastic hose ( 8 ). 5. Pipe and laying system according to claim 4, characterized in that the plastic hose ( 8 ) (in the longitudinal direction) is fiber-reinforced. 6. Pipe and laying system, in particular according to the preamble of claim 3, characterized in that the parallel corrugated pipe ( 2 ) is provided with a protective lacquer or is covered with a tight-fitting plastic tube (shrink tube). 7. A process for the production of a pipeline system, or a process for laying pipes, for central and floor heating, for cold and hot water pipes, and for underfloor heating, consisting of at least one pipe element, according to one of the preceding claims 1-6, characterized in that

• - That corrugated tube continuous goods ( 16 ) is flexibly laid according to a pipe laying plan to be specified,
• - That the endless tube ( 16 ) is sawn off in a trough ( 6 ) with a hacksaw or cut to length with a cutting tool as required and flanged with a flanging device in such a way that a flat sealing surface ( 28 ) is produced,
• - That one of the last corrugated tube troughs ( 6 ) is then provided with two half rings ( 30 a), ( 30 b), a union nut ( 32 ) having been put over the corrugated tube ( 2 ) beforehand,
• - That the flanged edge ( 28 ) of the corrugated tube ( 2 ) is then provided with a sealing ring (washer) ( 34 ), and
• - That finally the corrugated pipe end ( 26 ) thus prepared is screwed pressure-tight with a corresponding counterpart or with a heating or water pipe component.

8. A method for processing corrugated tube enlosware ( 16 ) to a pipeline system, according to claim 7, characterized in that one of the last corrugated tube troughs ( 6 ) instead of with two half rings ( 30 a), ( 30 b) with the projecting Edges ( 38 ) of two half-shell threaded pieces ( 36 a), ( 36 b). 9. Use of a parallel corrugated pipe ( 2 ), according to one of the preceding claims, for the manufacture of a piping and laying system, in particular for cold or hot water pipes, for central heating systems and floor heating systems, for installation under plaster, in baseboard arrangements, pipe shafts or the like and for laying as underfloor heating.