CH633092A5 - Thermally-insulated pipe - Google Patents
Thermally-insulated pipe Download PDFInfo
- Publication number
- CH633092A5 CH633092A5 CH1126178A CH1126178A CH633092A5 CH 633092 A5 CH633092 A5 CH 633092A5 CH 1126178 A CH1126178 A CH 1126178A CH 1126178 A CH1126178 A CH 1126178A CH 633092 A5 CH633092 A5 CH 633092A5
- Authority
- CH
- Switzerland
- Prior art keywords
- pipe
- tube
- tape
- corrugated
- insulated
- Prior art date
Links
- 238000009413 insulation Methods 0.000 claims abstract description 19
- 239000002184 metal Substances 0.000 claims abstract description 13
- 229910052751 metal Inorganic materials 0.000 claims abstract description 13
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 14
- 229910052802 copper Inorganic materials 0.000 claims description 14
- 239000010949 copper Substances 0.000 claims description 14
- 239000006260 foam Substances 0.000 claims description 14
- 229920003023 plastic Polymers 0.000 claims description 12
- 239000004033 plastic Substances 0.000 claims description 12
- 229920000728 polyester Polymers 0.000 claims description 6
- 230000001681 protective effect Effects 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 4
- 239000004698 Polyethylene Substances 0.000 claims description 2
- 239000007799 cork Substances 0.000 claims description 2
- 229920002457 flexible plastic Polymers 0.000 claims description 2
- 230000000873 masking effect Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 claims description 2
- -1 polyethylene Polymers 0.000 claims description 2
- 229920000573 polyethylene Polymers 0.000 claims description 2
- 238000005507 spraying Methods 0.000 claims description 2
- 238000010276 construction Methods 0.000 abstract 1
- 239000006261 foam material Substances 0.000 abstract 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
- F16L59/143—Pre-insulated pipes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/20—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of indefinite length
- B29C44/32—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements
- B29C44/322—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements the preformed parts being elongated inserts, e.g. cables
- B29C44/324—Incorporating or moulding on preformed parts, e.g. linings, inserts or reinforcements the preformed parts being elongated inserts, e.g. cables the preformed parts being tubular or folded to a tubular shape
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L59/00—Thermal insulation in general
- F16L59/06—Arrangements using an air layer or vacuum
- F16L59/07—Arrangements using an air layer or vacuum the air layer being enclosed by one or more layers of insulation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
- B29C48/151—Coating hollow articles
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/285—Feeding the extrusion material to the extruder
- B29C48/288—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules
- B29C48/2883—Feeding the extrusion material to the extruder in solid form, e.g. powder or granules of preformed parts, e.g. inserts, retaining their shape during the extrusion process
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
- B29K2995/0012—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular thermal properties
- B29K2995/0015—Insulating
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Thermal Insulation (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
Abstract
The thermally-insulated pipe consists of a metal pipe (1) which is sheathed by an internal flexible corrugated pipe (2) which, for its part, is sheathed by an external foam material insulating layer (4). Optimum insulation is achieved by means of this construction. <IMAGE>
Description
**WARNUNG** Anfang DESC Feld konnte Ende CLMS uberlappen **.
PATENTANSPRÜCHE
1. Wärmeisoliertes Rohr, dadurch gekennzeichnet, dass ein Metallrohr (1) von einem inneren flexiblen Wellrohr (2) umhüllt ist, welches seinerseits von einer äusseren Schaumstoffisolierschicht (4) ummantelt ist.
2. Rohr nach Anspruch 1, dadurch gekennzeichnet, dass zwischen dem Wellrohr (2) und der äusseren Isolierschicht (4) ein Kunststoffband (3) angeordnet ist.
3. Rohr nach Anspruch 2, dadurch gekennzeichnet, dass zwischen dem Metallrohr (1) und dem Wellrohr (2) und auch zwischen dem letzteren und dem Kunststoffband (3) Luftkammern (13 bzw. 14) eingeschlossen sind.
4. Verfahren zur Herstellung des wärmeisolierten Rohres gemäss Anspruch 1, dadurch gekennzeichnet, dass ein flexibles Kunststoffwellrohr längsgeschlitzt wird und dann um ein Metallrohr gelegt wird, dass dann das Wellrohr von einer Zwischenschicht, bestehend aus einem Band oder einer Folie, umgeben wird, und dass eine Schaumstoffisolierschicht mittels eines Extruders auf die Zwischenschicht aufgetragen wird.
5. Maschine zur Ausführung des Verfahrens gemäss Anspruch 4, dadurch gekennzeichnet, dass die Maschine ein Messer (7) zum Längsschlitzen des Wellrohres (2) aufweist, dass ein erster Einlaufschuh (8) vorgesehen ist, um das geschlitzte Wellrohr (2) um das Metallrohr (1) zu legen, und dass die Maschine einen Extruder (11) zum Aufspritzen der Schaumstoffisolierschicht aufweist.
Es ist bekannt (z.B. aus der CH-PS 500 424), zur Wärmeisolierung eines Kupferrohres ein Isolierband so um das Rohr zu legen, dass die Ränder des Bandes axial gegeneinandergerichtet sind. Das Isolierband besteht aus einem Trägerband, auf welchem eine Korkschrot-Isolierschicht unmittelbar vor dem Anbringen des Isolierbandes auf das Rohr aufgeklebt wird. Zur Abdeckung der Ränder des Isolierbandes wird ein schmales Abdeckklebeband von einer Abwickelvorrichtung abgezogen und auf die Ränder gedrückt, um diese zusammenzuhalten.
Aus der CH-PS 617 993 ist ferner eine Rohrisolation bekannt, bei welcher eine innere, gitterförmige Rohrumhüllung von einer Schaumstoffisolierschicht ummantelt ist. Auf diese Weise entstehen durch die Gitterrippen begrenzte und von der Isolierschicht abgedeckte, geschlossenzellige Luftklammern in der Rohrumhüllung.
Aufgabe der Erfindung ist es nun, die bekannten wärmeisolierten Rohre in bezug auf optimale Wärmeisolation zu verbessern. Das Rohr soll auch gegenüber Feuchtigkeit dicht und mechanisch nicht leicht verletzbar sein.
Erfindungsgemäss erfolgt dies so, dass ein Metallrohr von einem inneren flexiblen Wellrohr umhüllt ist, welches seiner seits von einer äusseren Schaumstoffisolierschicht ummantelt ist.
Nachfolgend wird anhand der Zeichnungen ein Ausführungsbeispiel der Erfindung näher erläutert. Es zeigen:
Fig. 1 schematisch eine Maschine zur Herstellung eines wärmeisolierten Rohres und
Fig. 2 Längsschnitte in verschiedenen Ebenen durch ein wärmeisoliertes Rohrstück.
Das in der Fig. 2 dargestellte Kupferrohr 1 ist von einem flexiblen Wellrohr 2 aus Kunststoff umhüllt. Letzteres ist seinerseits von einem Polyesterband 3 umgeben, auf welchem schliesslich ein äusserer Kunststoffisolationsmantel 4 aufgespritzt ist. Durch diese Ausbildung werden zwischen dem Metallrohr 1 und dem Wellrohr 2 und auch zwischen dem letzteren und dem Band 3 Luftkammern 13 bzw. 14 eingeschlossen.
Die Herstellung dieses isolierten Rohres erfolgt kontinuierlich auf der Maschine gemäss Fig. 1. Das flexible Wellrohr 2 wird von einer Vorratsspule 5 abgewickelt und über eine Leitrolle 6 einem Messer 7 und einem Einlaufschuh 8 zugeführt.
Das Messer 7 schlitzt das Wellrohr 2 in Längsrichtung auf.
Das Kupferrohr 1 gelangt in nicht näher dargestellter Weise mit stetigem Vorschub ebenfalls in den Einlaufschuh 8. Im Einlaufschuh 8 wird das längsgeschlitzte Wellrohr 2 um das Kupferrohr 1 gelegt, wobei seine Ränder 12 längsaxial ausgerichtet sind.
In einem anschliessenden Fertigungsschritt wird das von der Bandrolle 10 abgezogene und über die Umlenkrolle 15 geführte Polyesterband in einem zweiten Einlaufschuh 9 so an das Wellrohr 2 angelegt, dass seine Ränder in Längsrichtung aneinander anliegen. Das Rohr gelangt sodann in einen Extruder 11, wo es in an sich bekannter Weise mit einer geschlossenzelligen Schaumstoffisolierschicht 4, z.B. Schaumpolyäthylen, umgeben wird.
Als Schutz vor mechanischer Beschädigung und vor Feuch tigkeit könnte noch ein äusserer Schutzmantel aus Kunststoff angebracht werden. Dieser Schutzmantel wäre mittels eines weiteren Extruders um die Isolierschicht 4 zu spritzen.
Das beschriebene isolierte Rohr weist folgende Vorteile auf: - Der Welirnantel ist so konstruiert, dass er ein Minimum an Kontaktflächen mit dem zu isolierenden Kupferrohr aufweist. Dadurch wird ein minimaler Wärmeübergang bewirkt.
- Mit dem Wellinantel erreicht man eine sehr gute Isolation. Erstens durch die vorhandenen inneren Luftkammern zwischen dem Kupferrohr und dem Wellmantel, dann aber auch durch die äusseren Luftkammern, welche durch das Anbringen des Polyesterbandes über dem Welhnantel enstehen.
- Da der Welhuantel nicht spiralenförmig um das Kupferrohr gelegt wird, entstehen ringförmige, geschlossene Luftkammern. Neben den bedeutenden wärmetechnischen Vorteilen hat dies zusätzlich den grossen Vorteil, dass kein Wasser, wie z.B.
Betonwasser, usw., tief unter die Isolation eindringen kann.
- Der äussere Kunststoffmantel ist ein Schutzmantel primär gegen mechanische Beschädigung. Er dient aber auch als zusätzliche Isolation.
** WARNING ** beginning of DESC field could overlap end of CLMS **.
PATENT CLAIMS
1. Heat-insulated pipe, characterized in that a metal pipe (1) is encased by an inner flexible corrugated pipe (2), which in turn is encased by an outer foam insulating layer (4).
2. Pipe according to claim 1, characterized in that a plastic strip (3) is arranged between the corrugated pipe (2) and the outer insulating layer (4).
3. Pipe according to claim 2, characterized in that between the metal tube (1) and the corrugated tube (2) and also between the latter and the plastic band (3) air chambers (13 and 14) are enclosed.
4. The method for producing the heat-insulated pipe according to claim 1, characterized in that a flexible plastic corrugated pipe is slit longitudinally and then placed around a metal pipe, that the corrugated pipe is then surrounded by an intermediate layer consisting of a tape or a film, and that a foam insulating layer is applied to the intermediate layer by means of an extruder.
5. Machine for performing the method according to claim 4, characterized in that the machine has a knife (7) for longitudinally slitting the corrugated tube (2), that a first run-in shoe (8) is provided around the slotted corrugated tube (2) To lay metal pipe (1) and that the machine has an extruder (11) for spraying the foam insulation layer.
It is known (e.g. from CH-PS 500 424) to heat-insulate a copper pipe by placing an insulating tape around the pipe in such a way that the edges of the tape are axially directed towards one another. The insulating tape consists of a carrier tape on which a cork shot insulating layer is glued to the pipe immediately before the insulating tape is attached. To cover the edges of the insulating tape, a narrow masking tape is pulled off an unwinder and pressed onto the edges to hold them together.
From CH-PS 617 993 a pipe insulation is also known, in which an inner, latticed tubular casing is covered by a foam insulating layer. In this way, closed-cell air clamps are formed in the tube casing, which are bounded by the grid ribs and covered by the insulating layer.
The object of the invention is now to improve the known heat-insulated pipes with respect to optimal heat insulation. The tube should also be sealed against moisture and mechanically not easily vulnerable.
According to the invention, this is done in such a way that a metal tube is encased by an inner flexible corrugated tube, which in turn is encased by an outer foam insulation layer.
An exemplary embodiment of the invention is explained in more detail below with reference to the drawings. Show it:
Fig. 1 shows schematically a machine for producing a heat-insulated pipe and
Fig. 2 longitudinal sections in different planes through a heat-insulated pipe section.
The copper tube 1 shown in FIG. 2 is encased by a flexible corrugated tube 2 made of plastic. The latter is in turn surrounded by a polyester tape 3, on which an outer plastic insulation jacket 4 is finally sprayed. With this design, air chambers 13 and 14 are enclosed between the metal tube 1 and the corrugated tube 2 and also between the latter and the band 3.
This insulated tube is produced continuously on the machine according to FIG. 1. The flexible corrugated tube 2 is unwound from a supply spool 5 and fed to a knife 7 and a run-in shoe 8 via a guide roller 6.
The knife 7 slits the corrugated tube 2 in the longitudinal direction.
The copper pipe 1 also arrives in the run-in shoe 8 in a manner not shown in detail, with a constant feed. In the run-in shoe 8, the longitudinally slotted corrugated pipe 2 is placed around the copper pipe 1, its edges 12 being aligned axially axially.
In a subsequent manufacturing step, the polyester tape pulled off the tape roll 10 and guided over the deflection roller 15 is placed in a second run-in shoe 9 against the corrugated tube 2 such that its edges abut one another in the longitudinal direction. The tube then passes into an extruder 11, where it is coated with a closed-cell foam insulation layer 4, e.g. Foam polyethylene, is surrounded.
To protect against mechanical damage and moisture, an outer protective sheath made of plastic could be attached. This protective jacket would be injected around the insulating layer 4 by means of a further extruder.
The insulated pipe described has the following advantages: - The Welantel jacket is designed so that it has a minimum of contact surfaces with the copper pipe to be insulated. This results in minimal heat transfer.
- Very good insulation is achieved with the Wellinantel. First, through the existing inner air chambers between the copper tube and the corrugated jacket, but then also through the outer air chambers, which are created by attaching the polyester tape over the Welnantel.
- Since the Welhuantel is not placed in a spiral around the copper tube, ring-shaped, closed air chambers are created. In addition to the significant thermal advantages, this also has the great advantage that no water, e.g.
Concrete water, etc., can penetrate deep under the insulation.
- The outer plastic jacket is a protective jacket primarily against mechanical damage. But it also serves as additional insulation.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1126178A CH633092A5 (en) | 1978-11-01 | 1978-11-01 | Thermally-insulated pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CH1126178A CH633092A5 (en) | 1978-11-01 | 1978-11-01 | Thermally-insulated pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CH633092A5 true CH633092A5 (en) | 1982-11-15 |
Family
ID=4371746
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CH1126178A CH633092A5 (en) | 1978-11-01 | 1978-11-01 | Thermally-insulated pipe |
Country Status (1)
| Country | Link |
|---|---|
| CH (1) | CH633092A5 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2359605B (en) * | 2000-02-28 | 2004-04-21 | Mentor Subsea Tech Serv Inc | Pipe in pipe assemblies |
| WO2009043351A1 (en) | 2007-10-02 | 2009-04-09 | Logstor A/S | Bendable pre-insulated pipeline assembly |
-
1978
- 1978-11-01 CH CH1126178A patent/CH633092A5/en not_active IP Right Cessation
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2359605B (en) * | 2000-02-28 | 2004-04-21 | Mentor Subsea Tech Serv Inc | Pipe in pipe assemblies |
| WO2009043351A1 (en) | 2007-10-02 | 2009-04-09 | Logstor A/S | Bendable pre-insulated pipeline assembly |
| US8651148B2 (en) | 2007-10-02 | 2014-02-18 | Logstor A/S | Bendable pre-insulated pipeline assembly |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PL | Patent ceased | ||
| PL | Patent ceased |