DE8321728U1 - PIPELINE, IN PARTICULAR MULTI-CHANNEL PIPELINE - Google Patents

Description

PATENTANWALT..DR ₁ -ING. ..KLA, 1 ^ 5-'PURM KARLSRUHE FELIX-MO ^ L ^ -ST ^ ASSE · 1 & TELEBON! 853355 APPROVED REPRESENTATIVE AT THE EUROPEAN PATENT OFFICE

C 3184/83 Gbm July 27, 1983

Otto Tauschmann Ostmarkgasse 23/9

A - 1210 Vienna

Drilling pipe. In particular, Mehekanaleohrleituna

B e innovation concerns a drilling line, in particular multi-channel pipeline aura van at least one liquid and / odex * gaseous Medium, suspensions, e.g. anti-icing * tune, coolant pipeline »crude oil or * natural gas pipeline etc., with one, preferably made of fiber tossw. Asbestos" cement, resin concrete, plastic or the like «existing

Outer tube, and with at least one,

also made of fiber bjsw * asbestos cement, art · hax * 2betö &, plastic or the like. existing inner eye, in which a modium tube, preferably made of metal or plastic, is mounted displaceably by means of sliding pieces, in particular in the axial direction is, wherein the space between Xnnettrohr and Mediurotube is designed as an air gap.

In the case of district heating pipes, it is common to use the Medium-flowing »insulated pipes ixt casing pipes to be laid in order to protect the former from external stress. Such casing pipes can also be used in the chemical industry for steam lines, coolants— lines, etc. can be used.

AT-PS 295 093 is a double-walled one Pipeline with an outer pipe string known in an inner, insulated pipe strand made of metal, in particular steel pipes, can be slid over spacers is stored, each spacer from at least

consists of three ribs, which in particular the same distance from one another on the circumference of the inner tube strand are arranged and protrude from the latter in an approximately radial direction. In this known pipeline, which is often used as a remote control line " the outer drill string consists of pair cement, veraugs ve ie e asbestos-cement pipe «! *, and every clan is also made of fiber cement, see B «asbestos cement, formed and attached individually to the other tubing. These known pipelines are so far

mostly laid individually «In the case of heating cable systems ] with forward «and backward direction arises« in considerable

Verleguagsaui'vand, and also the thermal insulation is

unsatisfactory.'

f 15 Exercise of the innovation, it is to avoid these disadvantages and a leitungssystemenverwenbare especially in multi-channel tube ¹ · pipeline to. create, which reduces the heat losses in district heating linesf g && usv «and the expense of laying, des

Itonrsystems decreased. This will be in accordance with the innovation in a pipeline

of the type mentioned achieved in that it splits the medium pipe to form an air : surrounding pipe or inner pipe, and give «

V 25 if necessary additional pipes, for example Ent- and iij, ventilation roller, in the outer tube over its entire ·

'Length arranged without warmth or cold bridges

iat or are, and the cavity between the Auflenrohi * and the carrier pipe with the formation of an air— gap surrounding inner pipe or the inner pipes with elastic plastic foam, preferably polyurethane foam, is essentially completely foamed, so that the tubes arranged in the outer tube are spaced apart by means of this plastic foam body are held.

The innovation thus creates optimal warmth -? ·

or cold-insulated sin-, two- or melir-conductor- i »jacket pipe _f with the space between

the inner tube (core tube) and the outer (jacket—). >

Tube is filled with a plastic foam. It - ψ

You can therefore use both flow and - ·,

also return lines for one or more temperature |

Areas are guided, leading to elaer especially quick and efficient laying method.

This line. has the further advantage that the

Moisture penetration of the insulation from day, ground, condensation, and media water that occurs in the event of a malfunction is absolutely safe thanks to the installation of its own drainage system is prevented. This is a corrosion of the Media pipes from the outside are no longer possible. The plastic foam also has the function a spacer and ensures the correct position Distancing the pipes from each other.

In an embodiment of the innovation it is provided that

the plastic schaumkör ρ he in the axial direction over the front ends of the outer tube and preferably also over the front ends of the inner tube bzv * the inner tubes, for example 0.5 to 20 mm, protrudes, so that when joining the individual tube Shot the plastic show bodies of adjacent pipe shots lie against each other over the entire surface. In this way, a thermal or cold bridge is created prevented at the connection point of the pipe sections.

To connect the individual pipe sections of a pipe

piping system, it is advisable that, when the medium pipe runs through, at the connection point between adjacent outer pipes, these are externally or internally covered by a socket are surrounded, which are calibrated with the interposition of, possibly pre-tensioned sealing rings over the ends extends adjacent outer tubes.

■ Even if the carrier pipes are to be connected, it is » expedient if, at the junction of adjacent carrier pipes, the ends of the adjacent outer tubes and you tubes are offset in the axial direction with respect to this junction, wherein between the adjacent pipe sections an essentially identically constructed, coaxial insulating body is inserted tightly, and that the outer pipe is enclosed on the outside by a sleeve or sleeve which extends from the end of one pipe section over the insulating body to the end of the other pipe section.

It is advantageous here if the insulating body consists of two or more, by means of at least one '' Consists of segments held together, the parting lines between the elements preferably running in axial planes.

It is advantageous if the axial end faces of the foam body and / or of the insulating body are designed to be essentially planar, with these end faces sides are preferably provided projections and / or depressions for securing the position.

It is useful here that the foam body of the insulating body protrudes beyond the front ends of the same by, for example, 0.5 to 20 mm, so that when joining the foam body of the insulating body comes to rest over the entire surface against the foam body of the pipe arrangement.

With regard to the storage of the medium pipe in the inner pipe, which is also, for example, according to AT-Pat. 295 Ö93 could be carried out, the invention proposes in particular that for guiding the media umrohres Serving in the inner pipe sliders than on the outer circumference of the medium pipe, in particular by means of a Tendon, e.g. tension band force or friction

closely held skids are formed, wherein each skid on the one hand two "in Axialrichti & jig im A spaced-apart paragraph makes you laugh Support on the outer circumference of the hedium earth and on the other hand, has at least one support surface zxuc support on the inner circumference of the inner tube.

These skids are arranged on the circumference of the medium pipe, with two or more groups in the axial Distance from each other are provided. The stole and, Dimensions of the skids is determined according to the respective requirements.

In an embodiment of the invention it is provided that the skids are made from a band which runs in an axial plane and is preferably bent in a U, V or V shape consist of legs protruding at the ends, which the support surfaces of the skid on the medium " forming a pipe. Such skids can be produced in a simple manner by bending a band.

It is useful here that the tendons on

which form the support surfaces on the carrier pipe Legs rest on the outside, and if necessary with these are connected, for example by spot welding. The tendon encloses the in a radial plane arranged skids on the outside and thus ensures their friction «Final connection with the carrier pipe.

To improve the guidance, it is advantageous that the skid has a, preferably centrally arranged, in particular in an axial plane running web, which is connected on its side facing the inner tube with the skid and essentially extends into the area of the outer Ucafang of the medium pipe extends.

An additional position security is achieved if the web on its side facing the carrier pipe

with grooves, notches or the like. strand »is.

Bs is advantageous that the support surfaces of the Skid are essentially flat.

Bs is also possible, however, that the radially outer Support surface of the skid, which is used to support the Skid on the inside. The circumference of the inner tube is used, is convexly curved »

It is useful here that the radius of curvature of the support surface is smaller than the radius of curvature of the inner circumference of the inner tube.

The innovation is shown below with reference to the drawing, in the exemplary embodiments of the object are shown, described in more detail. Show it:

1 shows a cross section through a pipeline according to the innovation with only one Medium tube (single conductor),

2 shows a cross section through the pipeline according to the innovation with two medium

pipes (two-wire),

3 shows a cross section through a renewal device pipeline with three medium pipes (three-wire),

Fig. K shows a cross section through a more detailed

Straight pipeline with four medium pipes (four-wire), Fig. 5 shows a cross section through an innovation appropriate pipeline with several carrier pipes and additional ventilation and

Drainage pipes (multi-conductor), FIG. 6 shows a section along line VI-VI in

Fig. 5,

7 shows a longitudinal section through the pipeline in the region of the connection point in FIG

Casing pipes (short connection),

FIG. 8 shows a longitudinal section through a pipeline in the area of the connecting parts from FIG Jacket pipe and medium pipe (long coupling), 9 shows a section through a standing -

Branch shaft,

10 shows a section along line X-X in FIG. 11 shows a longitudinal section through the inner one Jacket pipe and Meditun pipe existing double-walled pipeline »

Pi". 12 shows a section according to Lind · XH-XIl in

Pig. 11

fig «13 the detail A from Pig. 11 in an enlarged mouse tab «Fig. Ik an enlarged Dare division of the sliding

skids in section,

fig «15 a plan view of ff. Ik and Pig «10-20 different designs of the runners» each generally cut. For the pipeline according to Pig »1, in an outer or jacket pipe 1 made of fiber bav «asbestos cement; an inner bav» core pipe 2 made of fiber bsv. Arranged asbestos cement, in which by means of skids, k an existing metal medium pipe is mounted displaceably in the axial sighting 3 "The inner tube 2 is disposed in the outer tube 1 over its entire length värmebrückenfrei" wherein the annular Höhlraum between AuAenrohr 1 and Xnaenrohr £ with an elastic plastic material foam 5 dim ves borrowed completely foamed. In addition, a ventilation pipe 6 and a drainage pipe 7 are embedded in the foam body.

By means of the foam body, which is preferably made of elastic rigid polyurethane foam, the inner tube is held in the correct position in the outer tube.

The gap between. Inner rim and medium pipe is not filled with foam, but designed as an air gap 3.

In the pipeline according to FIG. 2, in an outer or jacket pipe 1 made of fiber or asbestos

cement two spaced-apart Innenbzw. Core pipes 2 made of fiber »or asbestos cement, in which, by means of skids k each, a carrier pipe 3 made of metal in the axial direction; is slidably mounted. The inner tubes 2 are in the outer tube 1 arranged over its entire length värmebrüekenfrei the annular cavity between outer tube 1 and inner tube 2 with elastic »Kunatstotffsehaum 5 essentially completely made foams is «Xn the foamed body are also.

again a ventilation pipe 6 and drainage pipe .7 embedded «

Let the pipeline according to FIG. 3 are in. an outer "or jacket pipe 1 made of fiber or" asbestos " cement arranges three spaced-apart inner or core pipes 2 made of fiber or asbestos cement, in which a carrier pipe 3 made of metal is mounted so as to be displaceable in the axial direction by means of skids k. The inner tube 2 are in the outer jacket 1 and in relation to each other over the entire length without thermal bridges »whereby the annular cavity between outer tube 1 and inner tubes 2 with elastic synthetic foam 5 i & is essentially completely foamed * in the foam body also a drainage pipe 7 embedded.

As can be seen, the cross-sections of the inner tubes are different gröQ formed _t ie. an inner tube has a smaller cross-section than! the two others.

In the pipeline according to FIG. U , four inner or core pipes 2 made of fiber or asbestos cement are arranged at a distance from one another in an outer or casing pipe 1 made of fiber or asbestos cement, in which, by means of sliding runners, h a made of metal existing

Medium pipe 3 mounted displaceably in the axial direction

is. The inner pipes 2 are arranged in the outer tube 1 and in relation to each other along the entire length varmebrückenfrei, vobei the annular cavity between the outer pipe 1 and inner pipe 2 with elastic plastic foam ff s to 5 essentially of foamed complete. Vent pipes 6 and drainage pipes 7 and auxiliary SS ¹ OhPe 8 are also embedded in the foam body.

ϊη Fig * 5 and 6 is a pipeline; darge represents t in which in an »outer tube 1 four inner tubes 2 are arranged at a distance from one another in the wäraebruckenfa? ei aage« «Every inner tube contains ice. Medium pipe, which is axially displaceable on skids h . In addition, a ventilation pipe 6 _{t is in the outer pipe 1}

Drainage pipes 7 and auxiliary conductor pipes $

arranged «The cavity between the outer tube 1 and the As in the previous exemplary embodiments, inner tubes 2 are made of rigid polyurethane foam 5 foams. In the foam body 5 there are channels 10 about 5 to 10 mm from the foam tu ff surface, which lead from the inner pipes Si to the drainage pipes 7.

As shown particularly in Fig. 6, the foam protrudes body 5 by approx. 5-10 mm over the ends of the outside tube 1 or the inner tubes 2 in axial direction. The extent to which the foam body 5 over the protrudes named ends, is denoted in Fig. 6 with a.

Fig. 7 shows the connection of the outer tubes 1 in one described above. Pipeline; this is a short connection where no connection of the medium pipe is required. The illustration relates to a single conductor according to FIG. 1, but can in principle also be used for the two and multiple conductors according to FIGS. 2-6.

In the left half of Fig. 7, a socket connection is shown, which the outer pipes 1 in Area of adjacent ends. Encloses. For example, two to four sealing rings 12 are placed in the socket 11.

£ ■ Xn the right half of Fig. 7 ± * t a HUIeeni connection shown, for example, two to four over

. ' the ends of the outer tubes 1 tensioned sealing rings 12

which are surrounded by a sleeve 13 · IO In both cases, the end faces of the foam bodies are pressed against one another over the entire surface § of neighboring pipe sections.

I Fig. 8 shows the connection of the outer tubes 1 I of a pipeline described above \: es

^r 15 is a long connection, wherever

connect de ^ Mediutnrohre done · Vie in Fig. 7t, the description refers to a discharger I of FIG. I ₁ but also for the two "and

; Multi-conductor as shown in Fig. 2-6 can be used.

I 20 This long connection comprises a socket 111 or I sleeve 13 according to FIG. 7, which, however, is much longer than

in Fig. 7 is formed. Between the neighboring

I outer tubes 1, an insulating body 2, k is arranged. ^ The I is identical in structure to the pipeline, and also I 25 has a foam body 5 », but accordingly

% the number of inner or medium pipes 2 or 3 in

I is divided into a number of segments. These segments

are held together by means of straps I5. the Sleeve 11 or sleeve 13 thus extends axially

30 direction from the end of one outer tube over the Insulator 1Ί- away to the end of the other outer - pipe. The end faces of the over the ends of the Outer tubes 1 and the insulating body 14 protruding Foam bodies 5 or 5 'are as in the execution

35 example according to FIG. 7 pressed firmly together. The Ver-

• · · · · t dd

binding parts 3 * of the Hediurarohre 3 is opposite the. axial end faces of the foam bodies 5 and the south of the outer tubes 1 and inner tubes 2 in an axial direction Offset direction, and. is inside the insulator lh arranged. Sas connecting those who are standing together The ends of the Medxum tubes are carried out in a known manner Welding, soldering, gluing, etc.

The foam body 5 * consists of elastic Plastic foam, preferably from the same throw. material like the foam body 5 »e.g. rigid polyurethane foam.

9 and 10 show an upright branch shaft for a pipeline according to the invention, which is designed accordingly isolated.

The overall designated l6 shaft includes one Manhole body 17 with a manhole cover 18 and an access dome 19, which is provided with an insulated cover 20 surface watertight and thermally insulated can be closed. The entire shaft is lined with an inner lining 21 made of rigid polyurethane foam, and inside lined with a heat reflective layer 22. The branch couplings or shaft couplings 23 are like the pipe string itself insulates.

In the pipeline according to FIGS. 11 and 12 is

in an outer or jacket tube 1 made of fiber or asbestos cement an inner or core tube 2 made of fiber or. Asbestos cement arranged in which a metal carrier pipe 3 in is mounted displaceably in the axial direction. That Inner tube 2 is in the outer tube 1 over its entire Length arranged without thermal bridges, the annular cavity between outer tube 1 and inner tube 2 with elastic plastic foam 5 is substantially completely foamed. In the foam body there are also a ventilation pipe 6 and drainage

••• «9 *« ■■

tube 7 embedded.

Ih Fig. 12 to 20, the skid Il4 is shown in more detail. The skid 114 has the shape of a bridge-shaped multiple curved or angled Band, the two axially spaced support surfaces 118, 119 for support on the outer circumference of the medium pipe 3 and a Abs dance surface 110 for support on the inside. Scope of his -, tube 2 has. Several such skids 114 are at a distance from each other on the circumference of the carrier pipe 3 in.

a single radial plane thereof and are arranged held on the circumference of the medium pipe 3 by means of two tensioning straps 111 in a force-fitting or friction-fitting manner. the Tensioning straps 111 can be connected to the skids 114, e.g.

be connected by point welding. Bs understands that to support a Mediu "irohres 3 depending on Length of the same two or more such groups of skids arranged in a radial plane can be used.

20. As shown in particular FIGS. 14 and 15, the Skid 114 with a central, in an axial plane extending web 112 is provided, which extends transversely through the annular gap between the inner pipe 2 and the medium pipe extends and on its the inner tube 2 facing

Side is firmly connected to the skid 114. on

its side facing the medium pipe 3 is the web 112 with grooves, notches or the like. 113 provided.

In the illustrated embodiment, the support surfaces 118, 119, 110 are flat. The support surfaces can, however, be designed to be curved. In particular, the radially outer support surface 110, which serves to support the skid 114 on the inner circumference of the inner tube 2, can be convexly curved . It is useful here that the radius of curvature of the support surface is smaller than the curvature

of - 13 - • · • · · · · · · t
a inner Scope of Tnn f »pT» n> »i * Ä. ^ 2. radius

In the embodiment according to FIG. As a result , the axial guidance of the slide 114 serving the medium roller 3 seated inner tube 2 is formed on an essentially U-shaped bent band. The hater side of the U forms the support surface 110 for support on the inner circumference of the inner pipe Z, whereas the support surfaces 118, 119 for support on the outer circumference of the medium pipe 3 are formed by legs protruding from the upper edges of the U. The tensioning straps 111 rest against these legs and hold the skids 11k on the medium pipe 3. The web 112 is designed as in FIGS. 1h and 15.

Fig. 17 shows a skid 114, which consists of a approximately trapezoidal bent band with protruding. Legs and web 112 is made.

The web 112 does not have to be in the middle, but can also be a ·? or on both sides of the outer axial ends.

18 shows a skid 11 * 1, which consists of an approximately triangular or V-shaped curved sand with protruding legs for the tensioning straps 111. In this embodiment, for example, 1st no web required.

19 and 20 show skids II * f- in the form of Double brackets or double runners, the tensioning band 111 resting against a centrally arranged web 113.

The skids can be made of metal, in particular steel, and optionally surface-treated or be provided with a coating to provide appropriate protection against corrosion and a reduction in friction given is.

The innovation can be applied to pipe strings of any cross-section, including non-circular or angular cross-sections, e.g. oval, elliptical or polygonal cross-section or cross-section of a Releaux triangle.

- 14 - mil M >> · ··

Fiber cement and asbestos cement are also used as materials for the outer and inner tubes. Concrete, synthetic resin concrete, earthenware, plastics, metal, etc. into consideration.

If the innovation for Fernheizsys systems is applied, the pipeline can in particular both to

Transport of "cold district heating", geothermal water, which can also be used for hot water systems up to 90 °, heating water systems up to 13 ° C and heating water systems up to 170 ° C.

When transporting "cold remote heat", the transport of cooling water with a very low temperature from power stations and industries comes into question. In the one-pipe system, the medium is transported to the consumers and brought to the required heating temperature there by means of heat pumps. The water cooled by the heat pumps is discharged locally into a receiving water system. Systems of this kind are very economical because they can be laid with very little effort, similar to a water pipe. Investigations have shown that even without insulation, relatively "warm water" at approx. 15-20 ° C can be transported economically over several kilometers, but insulation must also be provided for ecological reasons.

When transporting geothermal water, pipes made of asbestos cement are used in particular, and these are provided with thermal insulation as required. Corrosion caused by seepage water in steel pipelines can be ruled out when pipes made of asbestos cement, a non-metallic material, are used. It goes without saying that care must be taken to ensure that only insulating material is used that remains functional even when exposed to moisture, e.g. no fiber insulating material.
Be the systems described above

eich do open circuits (l-pipe system), i.e.! dafl dad medium water after heat absorption by the consumer (e.g. heat pump or converter) into the nearest receiving water 'is derived.

At Hei2waseeraya shared 90 ⁰ G is «in Wttrm · -

transport system used, made of asbestos aemerit-Druek pipes ale MedAum pipes for flow and return, one common jacket pipe made of asbestos cement as well as a foaming of the cavity awisohen medium · and Jacket pipe by means of polyurethane foam consists «The ¹ pipes (medium and jacket pipes) are connected by means of conventional asbestos-cement couplings Coupling, additional rotation compensators and fixed points can be dispensed with entirely large savings compared to conventional pipelines possible during sowing and laying work

With the heating water system up to 90 ⁰ C a closed

A separate circuit (2-flow system) is provided, in which the return water is fed back to the boiler system for the purpose of renewed heating . chemical composition of the water to be passed through and whose temperature is also provided with a coating «» will.

For heating water systems up to 130 ° C and fieiäarassef * systems up to 170 ° C, the pipe structure is the same, u.zw. are inserted into a jacket pipe made of asbestos cement or. -

several core tubes made of asbestos cement installed in which either at the factory or at the construction site, by means of Skids spaced from the core pipe, the medium pipe a be drawn in from steel. The space between the jacket pipe and the core pipe is lined with polyurethane, where the XsοIierkraft according to the temperature

range, - 130 ° C and 170 C - is selected.

The lines are designed in such a way that the connection of the asbestos-cement jacket pipes is only possible in the area of the Steel pipe welds by means of insulated long couplings (up to steel DN 200 every 11 m and above every 3.6 n) takes place «The casing pipes in between are connected by means of close couplings«

This coupling arrangement has the advantage that every weld made on the construction site enters the area a long coupling comes up, and therefore the inspection of these welds without delay «fet * further relocation can take place «

These lines also offer the possibility of steel « pipe strings up to 300 m in one work step

1J5 jacket pipe already laid and the ones contained therein Pulling in core tubes *

There is also the option of exchanging longer steel pipe sections, with the corresponding large core tubes also later capacity expansions a by installing gx'oßeieeie steel pipe nominal widths are possible without dismantling the entire line «

The lines described above can, for Urban heel heating networks and for large overland transport lines are used, with in 2World If both underground and above-ground installation is possible «

In order to cover the entire holiday heating system, starting with Heat generator and ending with the noise consumer, a Achieve uniform insulation will also be all components belonging to a complete system appropriately isolated. This ensures, that there are no weak points in the entire system Insulation quality can come. Investigations have shown that in individual cases the Värmever lust β through shafts, fixed points, compensators and

- 17 - III! M · < t · »« I.

other components are a multiple of those of the pipelines themselves. In addition, the often inadequate construction results in a significant functional impairment of the insulation and thus in turn a

Increase in operating costs caused "

So that these weak parts are avoided » pre-insulated pipes, pre-insulated couplings, pre-insulated fixed points and vofiaolierte Sehaetytbautfm used·

The fact that all of these components are manufactured in the factory ensures that the planning underlying heat loss too, actually not exceeded en will «unpleasant surprises in Form of undetectable heat loss, otherwise soft only become visible after the district heating network has been commissioned »can therefore be ruled out with certainty will*

To the advantage of in-house prefabrication. ' Reinforcing is also used for the installation technology see facilities a component system used »tcelCuea 2 B. prefabricated branch manholes, prefabricated pump ensemble shafts, prefabricated compensator shafts, and prefabricated transfer stations.

When running these parts of the system, the

2-5 individual wishes of the district heating operator back lent be taken, however, also at the same time a standardization in technical and economic Respect. It is also planned to have these components already installed on the customer's request

Deliver construction site.

Due to the largely complete prefabrication, not only technically and economically optimal Products are offered, but it is also achieved that district heating networks in the future will be essential . shorter construction time and therefore with lower cost

wall can be created. The essential criteria of the systems for this are: the use of masonry multi-conductor jacket pipes, the significantly smaller external dimensions compared to traditional cables and the complete range of prefabricated cable components

District heating pipes currently in use

■ i great savings in both construction costs and -

"more importantly - very strong ft reductions

10 of the operating costs can be achieved through lower heat losses' .

Ϊ Belaaiel_1.8.

I sas example concerns the personal warmth & supply of one

I Small town, although due to the low flow temperature

Ι 15 temperature from SfO C a heating water system with 90 C : would see"

The problem was out in this small town In a thermal power station approx. 320 customers with a total of ..

I supply approx. 7.5 MW total connection power. Sine

An additional requirement consisted in choosing the system in such a way that despite the initially low connection density

the Metz can be easily upgraded at a later date.

The following plant-specific values were determined ir:

I 25 Total connected load approx. 7.5 HW I Consumers to be connected approx. 320

Total route length (from
Heating power station to the consumer house) approx. I34OO m

Heat loss per running meter of route 30 (at 9O / 5O ° C) approx. 20 W

Total heat loss approx. 3 ^e A

As can be seen from the list above, savings of approx. 35 compared to pre-insulated steel pipes. A.

Comparison, with the Haubenkaxtalbauweise e was not t

relevant, since the soil conditions and the topo— j.

excluded the graphic location of this system from the start. Example 2s . ·

The example concerns the most economical j

Solution for the establishment of a district heating — transport— line with the following technical specifications: -

Medium to be transported hot water 130/65 C Heat output to be transported 230 MW

Route length approx. 17500 m

There was a requirement to propose a line which, with the same standard cross-section, enables both above-ground and underground installation. Due to the high transport capacity, it was proposed to divide the line cross-section into two forward and reverse lines. This not only resulted in the optimal solution for the installation cross-section, but also had the advantage of achieving lower installation costs with the required 4 χ nominal steel width 450 than with 2 χ nominal steel diameter 650.

The heat losses of this modern multi-conductor with heating water of 130 ° C or 170 ° C are over the entire route length of approx. 17500 m with a maximum temperature drop of approx. IK expected.

This exceptionally low heat loss,

was able to do so by using the multi-conductor and by consistently eliminating all weak points (Supports, fixed points, shafts) can be achieved by means of prefabricated and pre-insulated components.

The construction costs for this line (including earthworks) are much lower than with known lines to be used, and again with this line

all components from factory prefabricated Components exist. There are all fixed points in it, Kompensatox 'shafts and branch shafts in heat » dämmtex> version included.

In comparison, a much higher temperature loss of about "7 K -was to run in. HaubenkanaTbauweise with significantly higher overall costs to the approximately 17,500 m Trässenlänge calculated ·

Claims (1)

C 3184/83 Gbm July 27, 1983 Protection claims 1. Pipeline, in particular multi-channel pipeline, for the transport of at least one liquid and / or gaseous medium or suspensions, for example district heating pipe, coolant pipe, petroleum or natural gas pipe, etc., with an outer pipe, preferably made of fiber or asbestos cement, synthetic resin concrete, plastic or the like, and with at least one, preferably likewise made of fiber cement or asbestos cement, synthetic resin concrete, plastic or the like. existing inner pipe, in which a carrier pipe, preferably made of metal or plastic, is slidably mounted by means of sliding pieces, in particular in the axial direction, the space between the inner pipe and the carrier pipe being designed as an air gap, and the cavity between the outer pipe and which the mediura pipe underneath Formation of an air gap surrounding the inner pipe or the inner pipes with elastic plastic foam, preferably polyurethane foam, is essentially completely filled, so that the pipes arranged in the outer pipe are kept at a distance from one another by means of this plastic foam body, characterized in that the medium pipe (3) underneath Formation of an inner tube (2) or the inner tubes (2) surrounding it, and possibly additional tubes, for example ventilation tubes (6,7,8), in the outer tube (1 / arranged free of thermal bridges over its entire length) is or are, and that for guiding the medium pipe (3) i In the inner pipe (2) | serving sliders are formed as on the outer circumference of the medium pipe (3) _f in particular by means of a tension member, e.g. tension band (111) t non-positively or frictionally held skids (114), each skid (114) on the one hand two axially spaced apart support surfaces (118, 119) for support on the outer circumference of the medium pipe (3) and on the other hand at least one support surface for support on the inner circumference of the Has inner tube (2). 2. Pipeline according to claim 1 »characterized in that the plastic scha umkorper (5) in axial direction over the front ends of the outer tube (1) and preferably also over the front ends Ends of the medium pipe (3) forming an air gap surrounding inner tube or the inner tubes (2). for example 0.5 to 20 mm, protrudes so that when joining of the individual pipe sections, the plastic scha umkorper (5) of adjacent pipe sections are in full contact with one another (Fig. 5,6). 3. Pipeline according to claim 1 or 2, characterized characterized in that with the medium pipe (3) running through the connection point of adjacent outer pipes (1) surround them on the outside or inside by a sleeve or sleeve (11, 13) are, which are interposed by, if necessary prestressed sealing rings (12) extending over the ends of adjacent outer tubes (1) (Fig. 7). 4. Pipeline according to claim 1 or 2, characterized in that benaqhbarter at the connection point Mecium tubes (3) the ends of the adjacent outer tubes (1) and inner tubes (2) with regard to this connection point are offset in the axial direction, with an essentially identical one between the adjacent pipe sections constructed, coaxial insulating body (14) is inserted tightly, and the outer tubes (1) on the outside of a sleeve or sleeve (11, 13) are enclosed, which extends from the end of a pipe section over the insulating body (14) extend away to the end of the other pipe section (Fig. 8). 5. Pipeline according to claim 4, characterized characterized in that the insulating body (14) consists of two or consists of several segments held together by means of at least one tendon (15), the separating layers preferably run in axial planes between the elements. . 23 - ^tJ ... ■ at ■ 6. Pipeline according to one of claims 1-5, characterized in that the axial end faces of the Foam body (5) and / or the insulating body (14) essentially flat in a manner known per se S are «where projections and / or on these end faces Depressions for Ugesiehexung are provided 7 · Pipeline according to one of claims 4-6 » characterized «that the foam body (S ¹ ) of the insulating body (14) protrudes over the front ends of the same by, for example 0.5 to 20 mm *, so that when joining the foam body (S *) of the insulating body (14) over the entire surface the foam body (S) of the pipeline comes to rest (FIG · β) · β. Pipeline according to one of claims 1 * 7 * IS characterized in that "at least one" preferably in a radial plane "running channel (lo) is formed in the foam body (S)" which starts at the circumference of an inner tube (2) and leads to a ventilation tube (6, 7) leads (Fig. 5). 9 "pipeline according to claim 1" thereby characterized in that the sliding runners (114) consist of a preferably U- * V * or Y / -förraig curved band with legs protruding at the ends, which run in an axial plane and which support the support surfaces (118,119) of the sliding runners (114) Form the medium pipe (3) (Fig. 14.16,17,18). lo · Pipeline according to Claim 9, characterized in that the tension members (111) are attached to the legs forming the support surfaces (118, 119) on the medium pipe (3) on the outside, and if necessary with these, for example by spot welding (Fig. 14, 16,17,18). 11. Pipeline according to claim 9 or lo, characterized characterized in that the skid (114) has at least one, preferably centrally or laterally arranged, in particular. having ridge (112) which extends in an axial plane and which on its side facing the inner tube (2) with the Skid (114) is connected and essentially up to the area of the outer circumference of the medium pipe (3) expresses (Fig. 14). 12 "pipeline according to claim 11" thereby characterized «that the web (112) on its the medium. tube (3) facing side with grooves, notches or the like «(113) is provided (Fig «U) * 13 · Pipeline according to one of claims 9-12 * characterized «that the support surfaces (113 * 119) of the skid (114) are essentially flat (Fig. 14-2o) 14 «pipeline according to one of claims 9-13 * characterized * that the radially outer support surface (lld) of the skid (114) »which is used to support the Skid (114) on the inner circumference of the inner tube (2) serves « is convexly curved " 15; Pipeline - according to claim 14, characterized characterized in that the radius of curvature of the support surface 2ο (Ho) of the skid (114) is smaller than the radius of curvature of the inner circumference of the inner tube (2).