EP1725351A2 - Procede de production d'une conduite fluidique, notamment d'une conduite fluidique dans une installation frigorifique au co sb 2 /sb - Google Patents

Procede de production d'une conduite fluidique, notamment d'une conduite fluidique dans une installation frigorifique au co sb 2 /sb

Info

Publication number
EP1725351A2
EP1725351A2 EP05764688A EP05764688A EP1725351A2 EP 1725351 A2 EP1725351 A2 EP 1725351A2 EP 05764688 A EP05764688 A EP 05764688A EP 05764688 A EP05764688 A EP 05764688A EP 1725351 A2 EP1725351 A2 EP 1725351A2
Authority
EP
European Patent Office
Prior art keywords
pipes
plastic
line
embedding
angle
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.)
Granted
Application number
EP05764688A
Other languages
German (de)
English (en)
Other versions
EP1725351B1 (fr
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
Original Assignee
Danfoss AS
Priority date (The priority date 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 date listed.)
Filing date
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/fr
Application granted granted Critical
Publication of EP1725351B1 publication Critical patent/EP1725351B1/fr
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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 C0 2 -Kältestrom.
  • a fluid is transported under high pressure and / or high temperatures.
  • the cables used for this purpose are generally 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 C0 2 (carbon dioxide) is used as a refrigerant, must have a considerable compressive strength. As a result, such a line is relatively expensive.
  • the invention has for its object to provide a fast and inexpensive method for producing a fluid line.
  • This object is achieved in that one feeds several pipes simultaneously via at least one roller, which is provided with circumferential grooves, and the pipes parallel helically wound, wherein each pipe along a helix leads and run the helices of all pipes parallel.
  • 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 plants which operate with a refrigerant which is under a higher pressure, for example CO 2 (carbon dioxide).
  • CO 2 carbon dioxide
  • 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. This takes into account the fact that the individual pipes later, ie when the windings have been completed, all at about the same axial position of the "screw" should end. By a sequential cutting and twisting of the tube bundle it is achieved that the cutting process can always be done in the same place. This results in the correct length of the individual pipes almost automatically.
  • 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. For example, you can twist the ends by about 10 ° to each other.
  • 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. Finally, if desired, additional facilities, such as electrical lines or the like, through the interior of the lead out.
  • 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.
  • Pipes terminate flush with the 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. It is preferred that one uses a laser for separating. 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 pipelines are guided against a deflection surface, which encloses a first angle in a feed plane with the feed direction 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. 3 shows the illustration of FIG. 1 from above, 4 a grooved deflection roller,
  • FIG. 6 the line according to FIG. 5 with aligned ends
  • Fig. 10 shows a modified embodiment of a line in a perspective view.
  • 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 pipes, which are shown in Fig. 1 from the side, in Fig. 2 from the front and in Fig. 3 from above.
  • the wall thickness of these pipes 5-9 is shown exaggerated in Fig. 2.
  • the wall thickness must be chosen so that it can withstand pressure generated in the hollow interior 10 of each pipe 5-9 when the pipe 5-9 is later used in a refrigeration system using C0 2 (carbon dioxide) as the refrigerant is working.
  • 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 adjacent to each other via three pulleys 11-13.
  • the pulleys 11-13 are the same.
  • the guide roller 11 is shown enlarged in Fig. 4. It has five circumferential grooves 14.
  • the two deflection rollers 11, 12 are shown fixed in place here.
  • the deflection roller 13 is in the direction of a
  • 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.
  • the deflection 17, more precisely, the recognizable in Fig. 1 component causes, together with the last guide roller 13, that the pipes 5-9 are bent annularly, so that in the in Fig. In FIG. 1 represents, so to speak, a circular shape of the bend.
  • 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 a deflection perpendicular to the Feed direction 16 received. Accordingly, the pipes 5-9 are guided on a helix.
  • the last guide roller 13 can support this
  • Deflection movement relative to the other two guide rollers 11, 12 have a rotation axis, which is no longer aligned parallel to the axes of the guide rollers 11, 12, but with this 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 are thus wound helically, whereby the orientation of the pipes 5-9 is maintained parallel to each other even during winding. After winding, the pipes 5-9 are still at each other. The turns thus produced form a hollow cylinder.
  • 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. So one first separates after reaching the predetermined length
  • Pipe for example, the pipe 5, from, then turns the body 4 on until the pipe 6 enters the position of the previously separated pipe 5 and then separates the pipe 6 from. This process is repeated, i. between the severing of the individual
  • Pipes 5-9 is always rotated by an angle equal to 360 ° through the number of pipelines.
  • 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 provided with a plastic 24 shown in Fig. 9.
  • 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. Through a core ensures that the hollow interior of the body 4 is not completely filled by the plastic 24, but a hollow cylinder remains. After spraying the plastic 24, the tension with which the ends of the body 4 against each other twisted or "wound up”, loosened again, so that the wound pipes 5-9 remain in the plastic 24 with a certain bias.
  • 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 inside the helically bent 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 connection piece 3 and protrude from the connector 3 with a small projection. 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 shows a modified embodiment of a pipeline 1, in which a total of ten pipelines are spirally wound to form a connection 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)
  • Physical Or Chemical Processes And Apparatus (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

L'invention concerne un procédé permettant de produire une conduite fluidique, notamment une conduite fluidique dans une installation frigorifique au CO2. L'invention vise à mettre au point un procédé rapide et économique. A cet effet, il est prévu d'acheminer plusieurs tuyaux simultanément par l'intermédiaire d'au moins un rouleau (11), qui est muni de rainures périphériques (14), d'enrouler les tuyaux (5 à 9) de manière hélicoïdale, parallèlement les uns aux autres, chaque tuyau (5 à 9) étant guidé le long d'une ligne hélicoïdale et les lignes hélicoïdales de tous les tuyaux (5 à 9) étant parallèles.
EP05764688A 2004-03-16 2005-03-15 Procede de production d'une conduite fluidique, notamment d'une conduite fluidique dans une installation frigorifique au co sb 2 /sb Active EP1725351B1 (fr)

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 (fr) 2004-03-16 2005-03-15 Procede de production d'une conduite fluidique, notamment d'une conduite fluidique dans une installation frigorifique au co2

Publications (2)

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

Family

ID=34961225

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05764688A Active EP1725351B1 (fr) 2004-03-16 2005-03-15 Procede de production d'une conduite fluidique, notamment d'une conduite fluidique dans une installation frigorifique au co sb 2 /sb

Country Status (9)

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

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
JP2024538030A (ja) * 2021-10-12 2024-10-18 トレヴィ システムズ インコーポレイテッド ツイストチューブを有する高分子チューブインシェル熱交換器

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Also Published As

Publication number Publication date
DK1725351T3 (da) 2009-01-19
ES2313382T3 (es) 2009-03-01
CN1953827B (zh) 2010-06-09
DE502005005258D1 (de) 2008-10-16
US7574885B2 (en) 2009-08-18
CN1953827A (zh) 2007-04-25
WO2005087403A2 (fr) 2005-09-22
WO2005087403A3 (fr) 2005-10-20
ATE406966T1 (de) 2008-09-15
EP1725351B1 (fr) 2008-09-03
DE102004012987A1 (de) 2005-10-13
DE102004012987B4 (de) 2006-12-28
PL1725351T3 (pl) 2009-01-30
US20070137275A1 (en) 2007-06-21

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