EP1725351B1 - VERFAHREN ZUM HERSTELLEN EINER FLUIDLEITUNG, INSBESONDERE EINER FLUIDLEITUNG IN EINER CO sb 2 /sb -K LTEANLAGE - Google Patents

VERFAHREN ZUM HERSTELLEN EINER FLUIDLEITUNG, INSBESONDERE EINER FLUIDLEITUNG IN EINER CO sb 2 /sb -K LTEANLAGE Download PDF

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Publication number
EP1725351B1
EP1725351B1 EP05764688A EP05764688A EP1725351B1 EP 1725351 B1 EP1725351 B1 EP 1725351B1 EP 05764688 A EP05764688 A EP 05764688A EP 05764688 A EP05764688 A EP 05764688A EP 1725351 B1 EP1725351 B1 EP 1725351B1
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EP
European Patent Office
Prior art keywords
pipes
conduit
embedding
angle
connecting piece
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Active
Application number
EP05764688A
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German (de)
English (en)
French (fr)
Other versions
EP1725351A2 (de
Inventor
Christian Borge Hansen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Danfoss AS
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Danfoss AS
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Publication date
Application filed by Danfoss AS filed Critical Danfoss AS
Priority to PL05764688T priority Critical patent/PL1725351T3/pl
Publication of EP1725351A2 publication Critical patent/EP1725351A2/de
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Publication of EP1725351B1 publication Critical patent/EP1725351B1/de
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D53/00—Making other particular articles
    • B21D53/02—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers
    • B21D53/06—Making other particular articles heat exchangers or parts thereof, e.g. radiators, condensers fins, headers of metal tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/06—Bending into helical or spiral form; Forming a succession of return bends, e.g. serpentine form
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/4935—Heat exchanger or boiler making
    • Y10T29/49362—Tube wound about tube

Definitions

  • the invention relates to a method for producing a fluid line, in particular a fluid line in a CO 2 refrigeration system, according to the preamble of claim 1.
  • a fluid is transported under high pressure and / or high temperatures.
  • the lines used for this purpose are usually made of metallic materials and have relatively high wall thicknesses. If one wishes at the same time flexible lines, e.g. To meet requirements for vibration resistance, these cables are often wrapped around their longitudinal axis. However, such wound lines can be made only with a limited cross-section. If you want a larger flow rate, then split the line into several individual tubes. The individually produced wound tubes are subsequently pushed into each other. This method is relatively expensive and requires tight tolerances with respect to the pitch and diameter of the turns.
  • a refrigeration system usually consists of several components. These include a compressor, two heat exchangers and a valve. These components must be connected by cables. In particular, in mobile applications, such as refrigeration systems, which are used for cooling in motor vehicles, they must Pipes in addition to corrosion resistance and vibration resistance also have some flexibility. On the other hand, such a pipe, especially if CO 2 (carbon dioxide) is used as a refrigerant, must have a considerable compressive strength. As a result, such a line is relatively expensive.
  • CO 2 carbon dioxide
  • the invention has for its object to provide a fast and inexpensive method for producing a fluid line.
  • the method is in principle suitable for the production of fluid lines, eg for hydraulic or refrigeration systems.
  • the process is of particular importance for installations which operate with a refrigerant which is under a higher pressure, for example CO 2 (carbon dioxide).
  • CO 2 carbon dioxide
  • the desired lateral alignment of the pipes relative to each other can be ensured in a simple manner. If one uses several roles of the same kind, then you can achieve a relatively accurate positioning of the individual pipes relative to each other over the circumference of the individual turns of the helix.
  • a guide with rollers is no longer essential, because the turns once formed no longer bend on its own.
  • the pipes are cut in succession after the turns have been produced, and that the bundle formed by the pipes is rotated by a predetermined angle between each cutting operation.
  • the ends of the pipes are bent parallel to the axis of the helix. This makes it easier to mount a connection for the pipes.
  • the subsequent assembly process is simplified.
  • the line is embedded in a plastic, at least in the region of its helical turns.
  • plastic should also be understood here a rubber.
  • the plastic stabilizes the "corpus" of the pipe, but at the same time ensures that the pipe has a certain flexibility.
  • the plastic sheath not only produces mechanical stabilization. It also causes an increased thermal resistance to the environment, so that heat losses can be kept low.
  • the embedding provides corrosion protection for the piping, especially when used in aggressive environments.
  • the ends of the conduit are twisted at a predetermined angle counter to the direction of winding, holding them in place in the twisted position and releasing them after embedding.
  • the embedding with the plastic can be done for example in an injection molding process.
  • the spaces between the individual windings filled by the plastic prevent the pipes from touching each other and causing them to chafe or rub against each other during the operation of the refrigeration system due to the vibrations that occur. Thus, unwanted noise is avoided, as well as a risk of possible leaks due to wear of the pipes at the points of contact is reduced. If you let go of the ends after injection molding (or other embedding), then the turns of the helix of all pipes are under a certain bias. This helps to improve the strength of the line.
  • the plastic is thus designed as a hollow cylinder.
  • the hollow interior saves weight. By leaving the interior or core free, the flexibility of the conduit is improved.
  • ancillary equipment For example, electrical lines or the like, lead through the interior of the line.
  • one provides associated ends with a common fitting. This facilitates subsequent assembly of the conduit in a technical facility, e.g. in a refrigeration system.
  • the ends of the pipelines are passed through the connection piece and a supernatant forming thereby separates. This ensures that the pipes terminate flush with the end face of the fitting.
  • the guidance of the refrigerant is then taken over exclusively by the pipelines, which are preferably formed from a suitable metal, for example aluminum.
  • the plastic only has a supporting function.
  • the laser is able to separate the supernatants flush with the end face of the fitting.
  • At least one deflection roller is provided, whose axis of rotation encloses an acute angle relative to the axis of the roller.
  • the deflection roller causes a lateral deflection movement of the supplied pipes and thereby controls the slope of the helix.
  • the Invention leads the pipes against a deflection surface, which includes with the feed direction a first angle in a feed plane and a second angle with the feed plane.
  • the pipes are thus deflected twice, so that they bend on the one hand in the circumferential direction of the helix, on the other hand, but also receive an axial feed, so that the helix results.
  • Fig. 9 shows a line 1 with two connecting pieces 2, 3 and a body 4, the production of which is to be explained below.
  • the body 4 is formed by five pipelines which are in Fig. 1 from the side, in Fig. 2 from the front and in Fig. 3 are shown from above.
  • the wall thickness of these pipes 5-9 is in Fig. 2 shown exaggeratedly big.
  • the wall thickness must be chosen to be high enough to withstand pressure generated in the hollow interior 10 of each conduit 5-9 when the conduit 5-9 is later used in a refrigeration system using CO 2 (carbon dioxide) as the refrigerant is working.
  • CO 2 carbon dioxide
  • Such pressures can certainly reach a magnitude of several 100 bar.
  • pipes 5-9 with a smaller cross-section are relatively more resistant to pressure than pipes with a larger cross-section but the same wall thickness.
  • the line 1 thus produced is also applicable to other refrigerants, including those which operate at lower pressures.
  • the pipes 5-9 are guided in a plane next to each other over three pulleys 11-13.
  • the pulleys 11-13 are the same.
  • the guide roller 11 is in Fig. 4 shown enlarged. It has five circumferential grooves 14. The number of circumferential grooves, which are evenly distributed in the axial direction of the guide roller 11, of course, depends on the number of simultaneously to be wound pipes 5-9.
  • the two pulleys 11,12 are shown fixed here.
  • the guide roller 13 is movable in the direction of a double arrow 15, ie perpendicular to the plane in which the pipes 5-9 are arranged during feeding.
  • the pulleys 11, 12 may be movable, if this should be necessary for an insertion.
  • the pipes 5-9 are fed in a feed direction 16. They can be handled by supply spools, not shown. Means by which the feed is generated are known per se and become therefore not shown in detail. For example, you can use this role pairs that act from opposite sides on the pipes 5-9 and cause by means of a frictional force driving on the pipes 5-9.
  • a deflection surface 17 is arranged in the feed direction 16 behind the last deflection roller 13.
  • This deflection 17 closes with her in Fig. 1 Direction component shown an angle not equal to 90 ° with the plane in which the pipes 5-9 are supplied.
  • the deflection 17, more precisely the in Fig. 1 recognizable component causes, together with the last deflection roller 13, that the pipes 5-9 are bent annularly, so that in the in Fig. 1 represented view, so to speak, a circular shape of the bend results.
  • the deflection 17 includes, however, with the feed direction 16 an angle not equal to 90 °, so that the supplied pipes 5-9 are deflected not only on a circular path, but also receive a deflection perpendicular to the feed direction 16 during deflection. Accordingly, the pipes 5-9 are guided on a helix.
  • the last guide roller 13 may have to support this deflection movement relative to the other two guide rollers 11, 12 has an axis of rotation, which is no longer aligned parallel to the axes of the guide rollers 11, 12, but with these forms an acute angle.
  • the guide roller 12 may be disposed at an acute angle to the guide roller 11 to the slope of the To control helix.
  • the deflection surface 17 serves to adjust the slope with a relatively high accuracy.
  • the pipes 5-9 now have ends that project "obliquely" from the body 4. So they have a radial and an axial direction component. However, they are all at least substantially the same length. This is achieved by not severing the individual pipes 5-9 at once when the body 4 has reached its desired length, but sequentially. Thus, after reaching the predetermined length, first a pipeline, for example the pipeline 5, is disconnected, then the body 4 continues to rotate until the pipeline 6 reaches the position of the previously separated pipeline 5 and then separates the pipeline 6. This process is repeated, i. between the cutting of the individual pipes 5-9 is always a rotation through an angle corresponding to 360 ° by the number of pipes.
  • the ends 18-22 are now bent and parallel to the axis of the body. 4 aligned. Thereafter, it is possible to postpone the connector 3 to the ends 18-22.
  • the connector 3 has for this purpose a number of holes 23, which corresponds to the number of pipes 5-9.
  • Fig. 7 shows a first embodiment of a fitting 3 with a circular shape.
  • Fig. 8 shows a modified embodiment of a connecting piece 3 'with a hexagonal shape and in Fig. 8a as a side view and in Fig. 8b as a front view.
  • the shape of the fitting 3, 3 ' depends on the later desired use.
  • the body 4 Before or after the sliding of the connector 3, the body 4 is still with a in Fig. 9 provided plastic 24 provided.
  • the plastic 24 may also be natural rubber, which is introduced for this purpose in a vulcanized form.
  • the production of the plastic is advantageously carried out by injection molding.
  • the body 4 is introduced for this purpose in an injection mold. Before the introduction, however, the ends of the body 4 are rotated against each other against the winding direction. This should be represented by the arrows 25, 26.
  • the angle of rotation is relatively small. It is for example 10 °. By this measure, there is a small distance between adjacent turns of the body 4, in which then during injection of the plastic 24 of the plastic can occur.
  • By a core ensures that the hollow interior of the body 4 is not completely filled by the plastic 24, but a hollow cylinder remains.
  • the two connecting pieces 2, 3 are pressed under pressure against the plastic 24. This is indicated by arrows 27, 28. Of course, the corresponding forces are directed so that the connecting pieces 2, 3 abut the entire surface of the end face of the plastic 24. Thereafter, the connecting pieces 2, 3 are welded or glued to the plastic 24, so that overall results in a quasi-monolithic block in which a flow path for the carbon dioxide refrigerant is formed in the interior of the helically curved pipes 5-9.
  • the ends 18-22 of the pipes 5-9 are so long that they, as shown in the connector 3, can be passed through the connector 3 and protrude with a small projection from the connector 3. This supernatant is separated by means of a laser cutter 29. This ensures that you can make the ends 18-22 flush with the end face of the connector 3.
  • Fig. 10 a modified embodiment of a pipe 1 can be seen, in which a total of ten pipes are helically wound to connect between two terminals 2, 3 to create.
  • the cavity which forms inside the body 4 is represented by a circular cylinder 30.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Pipeline Systems (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)
  • Physical Or Chemical Processes And Apparatus (AREA)
EP05764688A 2004-03-16 2005-03-15 VERFAHREN ZUM HERSTELLEN EINER FLUIDLEITUNG, INSBESONDERE EINER FLUIDLEITUNG IN EINER CO sb 2 /sb -K LTEANLAGE Active EP1725351B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05764688T PL1725351T3 (pl) 2004-03-16 2005-03-15 Sposób wytwarzania przewodu płynowego, a zwłaszcza przewodu płynowego systemu chłodniczego zasilanego CO2

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102004012987A DE102004012987B4 (de) 2004-03-16 2004-03-16 Verfahren zum Herstellen einer Leitung einer Kälteanlage, insbesondere einer CO2-Kälteanlage
PCT/DK2005/000175 WO2005087403A2 (de) 2004-03-16 2005-03-15 Verfahren zum herstellen einer fluidleitung, insbesondere einer fluidleitung in einer co2-kälteanlage

Publications (2)

Publication Number Publication Date
EP1725351A2 EP1725351A2 (de) 2006-11-29
EP1725351B1 true EP1725351B1 (de) 2008-09-03

Family

ID=34961225

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05764688A Active EP1725351B1 (de) 2004-03-16 2005-03-15 VERFAHREN ZUM HERSTELLEN EINER FLUIDLEITUNG, INSBESONDERE EINER FLUIDLEITUNG IN EINER CO sb 2 /sb -K LTEANLAGE

Country Status (9)

Country Link
US (1) US7574885B2 (pl)
EP (1) EP1725351B1 (pl)
CN (1) CN1953827B (pl)
AT (1) ATE406966T1 (pl)
DE (2) DE102004012987B4 (pl)
DK (1) DK1725351T3 (pl)
ES (1) ES2313382T3 (pl)
PL (1) PL1725351T3 (pl)
WO (1) WO2005087403A2 (pl)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9909783B2 (en) * 2010-02-23 2018-03-06 Robert Jensen Twisted conduit for geothermal heat exchange
JP5809910B2 (ja) * 2011-09-30 2015-11-11 積水化学工業株式会社 熱交換器の製造装置及び熱交換器の製造方法
US11530878B2 (en) 2016-04-07 2022-12-20 Hamilton Sundstrand Corporation Spiral tube heat exchanger
EP4399471A1 (en) * 2021-10-12 2024-07-17 Trevi Systems Inc. Polymeric tube-in-shell heat exchanger with twisted tubes

Family Cites Families (21)

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Publication number Priority date Publication date Assignee Title
US2145040A (en) * 1938-01-19 1939-01-24 Phelps Dodge Copper Prod Method of and machine for making crab joints
US3482425A (en) * 1965-12-10 1969-12-09 Inventions Inc Pivotal frame support for mounting alternately spaced bending rollers in different directions and twisting attachment secured to said support
US3444716A (en) * 1966-06-13 1969-05-20 Calumet & Hecla Device for bending,coiling,or straightening tubing
US3742567A (en) 1967-03-28 1973-07-03 Sulzer Ag Method of making a heat transfer device
US3646599A (en) * 1969-05-26 1972-02-29 Alexander Lightbody Apparatus for a method of forming coiled tube banks
US3938558A (en) 1973-10-26 1976-02-17 Manufacturers Systems, Inc. Flexible cylindrical metal tube
FR2371250A1 (fr) * 1976-11-19 1978-06-16 Technip Cie Procede de bobinage de tubes sur un noyau, dispositif pour la mise en oeuvre de ce procede et echangeur de chaleur a tubes bobines ainsi obtenu
US4451960A (en) * 1979-03-15 1984-06-05 Molitor Industries, Inc. Method of producing multiple coil, multiple tube heat exchanger
DE8026871U1 (de) * 1980-10-08 1981-01-29 R. & G. Schmoele Metallwerke Gmbh & Co Kg, 5750 Menden Vorrichtung zum waermetausch
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FR2532565B1 (fr) * 1982-09-03 1987-01-09 Framatome Sa Procede et dispositif de serpentinage des tubes d'un faisceau tubulaire d'un generateur de vapeur
DE8320837U1 (de) * 1983-07-20 1983-12-15 Plascoat U.K. Ltd., Woking, Surrey Mehrkernschlauch
DE8407241U1 (de) * 1984-03-09 1984-06-07 Wieland-Werke Ag, 7900 Ulm Gewickelter waermeuebertrager, insbesondere fuer waermepumpen oder kaelteanlagen
DE3616774A1 (de) * 1986-05-17 1987-11-19 Kabelmetal Electro Gmbh Waermeisoliertes leitungsrohr
US5737828A (en) * 1996-06-19 1998-04-14 American Standard Inc. Continuous heat exchanger forming apparatus
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US5845609A (en) * 1997-05-29 1998-12-08 Vapor Corporation Fluid heater coils
CN2476385Y (zh) * 2001-05-15 2002-02-13 胡启麟 金属骨架－塑料复合管
JP3962018B2 (ja) * 2001-10-01 2007-08-22 インテグリス・インコーポレーテッド 熱可塑性樹脂熱交換器、および熱可塑性樹脂熱交換器の作製方法
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CN2605087Y (zh) * 2003-01-16 2004-03-03 庄添财 立体螺旋管件的制造装置

Also Published As

Publication number Publication date
DE102004012987A1 (de) 2005-10-13
CN1953827B (zh) 2010-06-09
DE502005005258D1 (de) 2008-10-16
PL1725351T3 (pl) 2009-01-30
DK1725351T3 (da) 2009-01-19
EP1725351A2 (de) 2006-11-29
WO2005087403A3 (de) 2005-10-20
US7574885B2 (en) 2009-08-18
US20070137275A1 (en) 2007-06-21
WO2005087403A2 (de) 2005-09-22
DE102004012987B4 (de) 2006-12-28
ES2313382T3 (es) 2009-03-01
CN1953827A (zh) 2007-04-25
ATE406966T1 (de) 2008-09-15

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