WO1995016873A1 - Raccord de tuyaux - Google Patents

Raccord de tuyaux Download PDF

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Publication number
WO1995016873A1
WO1995016873A1 PCT/EP1994/004111 EP9404111W WO9516873A1 WO 1995016873 A1 WO1995016873 A1 WO 1995016873A1 EP 9404111 W EP9404111 W EP 9404111W WO 9516873 A1 WO9516873 A1 WO 9516873A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
tube
convoluted
screwed
chimney
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.)
Ceased
Application number
PCT/EP1994/004111
Other languages
German (de)
English (en)
Inventor
Hewing Bernd
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.)
2H-KUNSTSTOFFE Firma
Original Assignee
2H-KUNSTSTOFFE Firma
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 2H-KUNSTSTOFFE Firma filed Critical 2H-KUNSTSTOFFE Firma
Publication of WO1995016873A1 publication Critical patent/WO1995016873A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES 
    • F23J13/00—Fittings for chimneys or flues 
    • F23J13/02—Linings; Jackets; Casings
    • 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
    • F16L15/00—Screw-threaded joints; Forms of screw-threads for such joints
    • F16L15/005—Screw-threaded joints; Forms of screw-threads for such joints for thin-walled pipes having at least their extremities deformed so as to have the shape of screw-threads
    • 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
    • F16L25/00—Construction or details of pipe joints not provided for in, or of interest apart from, groups F16L13/00 - F16L23/00
    • F16L25/0036—Joints for corrugated pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/08—Tubular elements crimped or corrugated in longitudinal section
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/06—Arrangements for sealing elements into header boxes or end plates by dismountable joints
    • F28F9/10—Arrangements for sealing elements into header boxes or end plates by dismountable joints by screw-type connections, e.g. gland
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/02—Header boxes; End plates
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/06—Arrangements for sealing elements into header boxes or end plates by dismountable joints
    • F28F9/12—Arrangements for sealing elements into header boxes or end plates by dismountable joints by flange-type connections

Definitions

  • the present invention relates to a tube connection for convoluted flexible plastic tube.
  • Flexible plastic pipes are used in many technical areas today. Such pipes are used in a variety of ways to guide media of all kinds. Such pipes are often used as cable protection or as a cable feed guide. When used in energy technology, special demands are placed on such plastic pipes in terms of temperature resistance, chemical resistance, flexibility, service life, ease of installation, etc., as is the case, for example, in heat exchanger applications or heating applications.
  • Another area of application is the transport of media of all kinds, for example in food technology, chemistry, heating technology and in particular in heat exchanger arrangements and hydraulic applications.
  • the present invention has set itself the task of eliminating the disadvantages of the prior art. In particular, to find a reliable solution for plastic pipe connections which are simple and quick to assemble and are highly economical.
  • the solution is to use a plastic tube which is produced by a special process and which is flexible. This process results in a spiral all-plastic tube or spiral corrugated tube, which is referred to as convoluted in technical language.
  • These tubes are particularly flexible and easy to handle, making them particularly well suited to the solution of the present task.
  • the type of spiraling of the plastic pipe allows the thread-like pipe that is present as a result of the spiraling to be used directly as a screwing element at butt joints. This is therefore particularly inexpensive and easy to handle have because the thread on the tube is already inherent. If a plastic is used with sufficient flexibility, pipe parts can be screwed into one another directly, without additional connecting elements, even if the pipe pieces have the same dimensions in diameter.
  • connection technology can also be used advantageously for the pipe connections to wall or body parts of different apparatus. This enables secure connections which can be produced economically even with a large number.
  • This type of connection technology using convoluted tubes opens up new and diverse areas of application.
  • connection technology is particularly suitable, for example, for fireplace linings and renovations which have to withstand the chemical, thermal and mechanical demands.
  • a chimney lining of this type is simple to assemble and inexpensive to produce and is also particularly suitable for subsequent insertion into curved chimney runs.
  • the tubular plastics suitable for this purpose are preferably fluoroplastic, since these can meet the chemical and thermal requirements.
  • a particularly simple assembly, as well as a cost saving results from subdivision of the chimney pipe into two or more pipe sections which are screwed together. Due to the type of spiraling (convoluting), it is possible to screw pipe pieces that were made of plastics such as fluoroplastics and that can also consist of different provenances directly into one another. This enables a completely positive connection.
  • the boiler can start with a high-temperature-resistant fluoroplastic, in order subsequently to continue with a cheaper fluoroplastic with a lower continuous operating temperature in accordance with falling exhaust gas temperatures.
  • This gradation can take place in two, three or more pipe sections depending on the design of the combustion system, that is to say the level of the flue gas temperature at the boiler and the length of the flue. It is advantageous to code the different use temperatures of the plastic material by means of color in order to avoid confusion during assembly.
  • the assembly of a combined pipe is very easy because of its flexibility.
  • the advantages of a mixed calculation resulting from the combination of differently expensive fluoroplastics enable the creation of chimney systems with high economic efficiency.
  • the tube bundle allows a high degree of flexibility.
  • the convolution allows a screw connection as a form conclusive connection with different fluoroplastic tubes, even without special connecting elements being necessary.
  • the convoluted tube in the screw connection area is advantageously provided with a sealant before assembly.
  • the pipe principle and the possibility of achieving a positive fit via the screw connection is also suitable for use in the construction of heat exchangers, such as gas-gas heat exchangers.
  • liquid media or combinations thereof can also be used advantageously.
  • the spiral tubes can, for example, be screwed into the bottom of the heat exchanger or preferably be mounted on the bottom.
  • Pieces of pipe can also be easily connected to one another.
  • pipes of this type are suitable where positive connections are to be produced in a simple manner in thermal engineering applications.
  • short pipe sections that are also bundled together can be used as socket elements.
  • Fig. La shows a cross section schematically through a screwed wall area of two convoluted tubes Fig. Lb a pipe fitting in a spatial representation
  • Fig. 2 is a pipe fitting with a seal
  • Fig. 3 shows a pipe fitting without a seal
  • Fig. 4 shows an assembly example of a corrugated pipe on a
  • FIG. 5 another assembly example of a corrugated tube on a heat exchanger base.
  • FIG. 6 another assembly example of a corrugated tube on a heat exchanger base.
  • FIG. 1 A pipe connection according to the invention and preferred is shown in FIG.
  • the cross section shows half of a pipe connection with the central axis 15 and an outer pipe 13 and an inner pipe 14.
  • the connection is established by twisting the two convoluted pipes into one another.
  • the spiral shape forms a kind of thread which enables the pipes to be twisted into each other because they are sufficiently elastic.
  • several gears are rotated at least 3, for example 4, into one another, so that a firm connection is created.
  • the space 12 between the tubes 13, 14 can be provided with a sealant as required, for example with silicone, adhesive or sealing tape such as Teflon tape.
  • the pipes can also be secured against rotation, for example by drilling a hole and using a screw or rivet.
  • FIG. 1b shows the configuration shown in FIG. written pipe connection in spatial representation.
  • Fig. 2 shows another example of a pipe connection with a seal.
  • the pipe connection consists of a union nut 17 which is pushed onto the convoluted pipe 16.
  • a seal 2 for example made of silicone, which is smooth on the inside, is screwed into the tube.
  • the threaded ring 19 is rotated onto the tube 16.
  • the pipe 16 is pushed pre-assembled onto the cylindrical attachment of the sleeve.
  • the union nut 17 onto a sleeve element 18 the silicone seal is pressed through the compressing spiral passages of the tube on the end wall and onto the cylindrical attachment of the sleeve.
  • the thread of the union nut could be replaced by a bayonet lock with a closing curve. This creates a tight connection that is easy to create.
  • FIG. 3 Another example is shown in FIG. 3.
  • the same mode of operation as described under FIG. 2 is shown, but without the silicone seal.
  • the free spiral gears of the tube are compressed via a threaded ring 19 with the union nut 17.
  • Such connections are suitable for applications where high tightness is not required.
  • lent for example for cable protection applications or certain heat exchanger applications with air as a medium.
  • the aforementioned sleeve elements can also be provided directly with fastening means for mounting on chassis parts such as metal sheets.
  • FIG. 4 shows a connection arrangement in which a counterpart as a retaining ring 21 is embedded and fixed directly in a heat exchanger base.
  • the tube 16 is pushed through a borehole in the exchanger base 24, then a threaded ring as a retaining ring 21 is turned onto the tube and then placed in the exchanger base from above.
  • a locking pin 26 prevents the retaining ring from rotating.
  • the conical clamping part 23 is screwed in and presses the pipe wall sealingly against the retaining ring 21.
  • the clamping part is rounded, so that when the screw is screwed in, the pipe end is flanged, which ensures a secure connection.
  • the threaded ring or retaining ring 22 with an inserted O-ring 25 could first be rotated onto the tube, for example according to FIG. 5.
  • the retaining ring 22 is mounted on the bottom of the exchanger from below.
  • a conical clamping part 23 is mounted as described under Fig. 4 in order to achieve a non-positive, sealing connection.
  • FIG. 6 shows the pipe connection for the connection of pipes in heat exchanger bottoms.
  • the convex pipe 16 is screwed onto a counterpart 28.
  • the counterpart 28 consists of a short tube piece or retaining ring with a few thread turns, which are designed such that the convoluted tube 16 can be screwed on directly.
  • this pipe section is advantageously conical towards the pipe end in order to clamp the screwed-on pipe.
  • a likewise conical lock nut 27 is screwed onto the tube 16 preassembled of the clamping part 28. This creates a pressure with a positive connection on the corrugated pipe.
  • the counterpart 28 is then hammered, pressed or screwed into the base of the diver via a fit.
  • additional sealing elements can be provided, for example O-rings 25.
  • the arrangement can of course also be constructed inversely, that is to say the lock nut 27 can be fitted on the inside of the pipe and the counterpart 28 on the outside of the pipe.
  • a chimney system according to the invention for a combustion system is shown, for example, in cross section in FIG. 7, a chimney draft being shown starting from a fireplace which is connected to a chimney pipe which connects the Exhaust fumes away.
  • the fireplace 4 can be a conventional boiler system or, preferably, a low-temperature boiler system.
  • a chimney pipe 5 is connected in the usual way to a nozzle 6, which creates a connection with the fireplace 4.
  • the chimney pipe 5, which conducts the exhaust gases away consists of a convulsed corrugated plastic pipe.
  • This corrugated pipe 5 is, for example, routed, as usual, in a brick chimney made of bricks 3, the pipe being guided such that it is insulated from the chimney shaft, for example with a rear ventilation 1.
  • a curved chimney path 2 is shown, which in practice makes particular difficulties in chimney renovations when pipes 5 have to be pulled in subsequently.
  • this is particularly simple if flexible plastic corrugated tubes are now used, which are convoluted, that is to say spiral, and these tubes are subdivided and can be screwed directly into one another.
  • a chimney draft can consist of a three-part, convoluted plastic pipe 7, 8, 9.
  • two or more-part pipe arrangements are also possible, this depends on the length of the chimney draft and the difficulty of the pipe assembly. This means that the pipe sections can be divided so far that simple assembly is still possible.
  • the procedure is such that first a first. flexible pipe 7 is drawn in and is attached to the boiler nozzle 6. Then a further piece of pipe can be seen from above be inserted into the chimney shaft and screwed to the first pipe section.
  • the further pipe section can already consist of several screwed pipe sections 8, 9.
  • a first piece of pipe is pushed in from below or also from above and a further and possibly subsequent pipe pieces are screwed one after the other and pushed into the chimney shaft.
  • the tube screw connections 10 can be realized in a simple manner, since the convoluted tubes are spiral and have sufficient elasticity so that they can be screwed directly into one another.
  • Pipe screw connections 10 can, however, also be produced by additional, short elements consisting of convoluted pipe pieces, which form a type of sleeve and are screwed over the butting points.
  • the screwing points 10 are advantageously provided with sealing means, such as, for example, silicone rubber, sintered Teflon tape or also fluoroplastic-compatible adhesives.
  • These sealing means 12 are attached between the outer corrugated tube 13 and the inner corrugated tube 14 in order to avoid gas losses at the joints 10.
  • a cross section through such an impact point 10 is shown in FIGS. 1b and 1b, only one half of the tube cross section being shown relative to the central axis 15.
  • sleeve connections according to FIGS. 2 and 3 can also be used.
  • Connections according to FIGS. 4, 5 and 6 can also be used for pipe connections at the end.
  • That convoluted Plastic pipe which is used in such chimney systems must withstand a certain temperature load, which means that materials must be used which are suitable in this regard.
  • Corrugated tubes made of fluoroplastics are particularly suitable which have a sufficiently high temperature resistance and also a high chemical resistance. For the temperature range up to 260 ° C it is proposed to use a fluoroplastic, for example made of PFA or PTFE.
  • the plastics can, for example, be color-coded, that is to say colored in themselves, for example red, orange here.
  • FEP is suitable, for example with a color coding yellow.
  • plastics such as ETFE, ECTFE, PVDF can be used, and if a color coding is desired, green / blue can be used as coding.
  • ETFE ETFE
  • ECTFE ECTFE
  • PVDF thermoplastic material
  • the plastic pipe which is divided, can consist of different types of plastic with different temperature resistance. That is, leading away from the key connection, pipe sections can be used which consist of plastic material in stages, which decrease in their temperature resistance.

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Geometry (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Abstract

L'invention a pour objet un dispositif de raccord de tuyaux en plastique utilisés dans différents domaines techniques tels que le transport de fluides de tout type, par exemple dans les échangeurs de chaleur ou sous forme de conduits de cheminée. Ces tuyaux peuvent également être utilisés comme tubes conducteurs ou protecteurs pour des câbles. Dans ce type d'applications, la technique de raccord choisie conditionne largement le succès de l'utilisation de ces tubes en plastique. Le montage des raccords doit en effet être très fiable, simple et rapide, ce qui exige une grande efficacité. Le remplacement ultérieur de ces tuyaux doit également être facile, en particulier dans le cadre de travaux de rénovation. Le dispositif selon l'invention est constitué d'un tuyau en plastique (13, 14, 16) présentant une paroi souple en spirale de type filetée, qui sert directement d'élément de vissage pour former le raccord de tuyau.
PCT/EP1994/004111 1993-12-16 1994-12-10 Raccord de tuyaux Ceased WO1995016873A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH3758/93-3 1993-12-16
CH375893 1993-12-16

Publications (1)

Publication Number Publication Date
WO1995016873A1 true WO1995016873A1 (fr) 1995-06-22

Family

ID=4262866

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP1994/004111 Ceased WO1995016873A1 (fr) 1993-12-16 1994-12-10 Raccord de tuyaux

Country Status (1)

Country Link
WO (1) WO1995016873A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1227277A3 (fr) * 2001-01-26 2003-05-07 Willi Skoberne Tuyau de gaz d'échappement pour appareils de combustion dans des bâtiments
EP1209434A3 (fr) * 2000-11-23 2006-04-12 Babcock Borsig Service GmbH Echangeur de chaleur pour échange de chaleur indirecte
DE202008003519U1 (de) * 2008-03-12 2009-07-30 Rehau Ag + Co Wellschlauch aus Kunststoffmaterial zur Ummantelung von wenigstens einem Abgassensor-Kabel
DE102024003445A1 (de) 2024-10-18 2026-04-23 Christian Niestolik Schadstoff-Überwachungssystem für Be-und Entlüftungsanlagen

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB175410A (en) * 1919-08-11 1922-02-16 Emmor Marsh Bayne Improvements in joints for stove pipes and the like
US3635255A (en) * 1969-09-26 1972-01-18 Vance M Kramer Corrugated flexible hose with integral socket and apparatus for forming same
FR2121303A5 (fr) * 1971-01-08 1972-08-18 Wavin Bv
FR2528533A1 (fr) * 1982-06-09 1983-12-16 Capri Codec Sa Raccord traversant a ecrou tournant pour gaine exterieurement spiralee
FR2677688A1 (fr) * 1991-06-11 1992-12-18 Wirquin Plastiques Sa Tube de raccordement pour cuvette de toilettes.
US5267877A (en) * 1992-11-23 1993-12-07 Dynawave Incorporated Coaxial connector for corrugated conduit

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB175410A (en) * 1919-08-11 1922-02-16 Emmor Marsh Bayne Improvements in joints for stove pipes and the like
US3635255A (en) * 1969-09-26 1972-01-18 Vance M Kramer Corrugated flexible hose with integral socket and apparatus for forming same
FR2121303A5 (fr) * 1971-01-08 1972-08-18 Wavin Bv
FR2528533A1 (fr) * 1982-06-09 1983-12-16 Capri Codec Sa Raccord traversant a ecrou tournant pour gaine exterieurement spiralee
FR2677688A1 (fr) * 1991-06-11 1992-12-18 Wirquin Plastiques Sa Tube de raccordement pour cuvette de toilettes.
US5267877A (en) * 1992-11-23 1993-12-07 Dynawave Incorporated Coaxial connector for corrugated conduit

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DRAKA POLVA B.V.: "RENOFLEX ROOKGAS AFVOERSYSTEEM", PRODUKTINFORMATIE, January 1991 (1991-01-01) *

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1209434A3 (fr) * 2000-11-23 2006-04-12 Babcock Borsig Service GmbH Echangeur de chaleur pour échange de chaleur indirecte
EP1227277A3 (fr) * 2001-01-26 2003-05-07 Willi Skoberne Tuyau de gaz d'échappement pour appareils de combustion dans des bâtiments
DE202008003519U1 (de) * 2008-03-12 2009-07-30 Rehau Ag + Co Wellschlauch aus Kunststoffmaterial zur Ummantelung von wenigstens einem Abgassensor-Kabel
EP2101095A3 (fr) * 2008-03-12 2013-07-17 Rehau AG + Co Tuyau ondulé en matière plastique destiné à gainer au moins un câble de capteur de gaz d'échappement
DE102024003445A1 (de) 2024-10-18 2026-04-23 Christian Niestolik Schadstoff-Überwachungssystem für Be-und Entlüftungsanlagen

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