EP0960302A1 - Systeme a double tube, procede et outils pour la production dudit systeme - Google Patents

Systeme a double tube, procede et outils pour la production dudit systeme

Info

Publication number
EP0960302A1
EP0960302A1 EP98907886A EP98907886A EP0960302A1 EP 0960302 A1 EP0960302 A1 EP 0960302A1 EP 98907886 A EP98907886 A EP 98907886A EP 98907886 A EP98907886 A EP 98907886A EP 0960302 A1 EP0960302 A1 EP 0960302A1
Authority
EP
European Patent Office
Prior art keywords
pipe
double
tube
core
double pipe
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.)
Withdrawn
Application number
EP98907886A
Other languages
German (de)
English (en)
Inventor
Josef Kröner
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP0960302A1 publication Critical patent/EP0960302A1/fr
Withdrawn legal-status Critical Current

Links

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
    • F16L39/00—Joints or fittings for double-walled or multi-channel pipes or pipe assemblies
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D17/00—Domestic hot-water supply systems
    • F24D17/0078—Recirculation systems
    • F24D17/0084—Coaxial tubings

Definitions

  • the invention relates to a double-pipe system, in particular for heating, sanitary, refrigeration and process engineering, a method for producing the system and tools for carrying out the method, according to the preamble of claims 1, 13 or 15 and 16.
  • Heating systems require two-pipe systems that direct the water heated by the boiler to the radiators and back to the boiler.
  • two-pipe systems are required to conduct the hot water heated by the boiler via the main line to the consumers (e.g. shower) and back to the boiler via a secondary or circulation line.
  • Such a double-tube system is known from DE 31 05 406 AI, consisting of the double tubes themselves and necessary connecting parts, such as sleeves with centering and sealing device and connecting pieces.
  • the double tubes are each composed of a core tube and a jacket tube, which are kept concentrically at a distance from one another by means of centering rings with radial centering webs pushed onto the core tube, the two tubes remaining axially displaceable relative to one another.
  • the double pipe parts are assembled in the system by core pipe sleeves with centering device. A self-sealing effect is only achieved for the core tubes in that the cylindrical core tube in the conical sleeve e.g. is driven by axial hammer blows.
  • a circulation line for a water line for hot domestic water in which a relatively thin circulation line made of plastic, concentrically held by holders not described, is arranged concentrically within a copper pipe.
  • the outer copper pipe connects a water heater with hot water points, such as a tap, with the inner circulation pipe open in front of the Tap or hot water point ends inside the outer copper pipe.
  • the circulation line is led out of the copper pipe, passed through a circulation pump and then flows into the hot water generator.
  • circulation is always achieved within the copper pipeline, specifically from the outside of the copper pipeline into the plastic circulation line and the hot water generator.
  • the jacket pipe is the hot water supply pipe and thus must be correspondingly well insulated from the outside
  • the inner core pipe is only suitable for returning a relatively small part of the warm water directed to the hot water points to the hot water generator in order to to achieve a constant hot water cycle and thus to constantly provide hot water at the hot water points. It is particularly unsuitable as a double-pipe system for heating technology in which the water cooled in the heating elements can be traced.
  • the invention is therefore based on the object, a double pipe system o.g. To provide genre, with appropriate manufacturing processes and tools, through which manufacturing, assembly and storage are significantly simplified and costs are reduced.
  • the core tube, jacket tube and webs having double tubes and the matching double tube fittings are made, for example, from one piece from injection molded plastic.
  • plug-in fittings are incorporated into the core and jacket tubes at the tube ends.
  • Connection gradations are provided, which ensure smooth-walled transitions inside and outside when joining.
  • the plug-in connection parts which are preferably designed as corresponding connecting sleeves and connecting pins, can be joined together with a suitable adhesive to form a permanent, leak-tight unit.
  • the advantages associated with the invention are, in particular, the considerable simplification of assembly, since the individual parts of the double pipe systems, such as one-piece double pipes, connecting pieces and fittings, can each be plugged and glued together such that the core and casing pipes fit tightly into one another and that smooth-walled transitions without Projections or changes in diameter occur at the joints.
  • the inside of the pipes results in a significantly lower heat radiation of the transported liquid to the outside.
  • the supply line to the radiators represents the inner core tube and the return line takes place in the outer jacket tube.
  • an insulating effect for the hot liquid of the inner pipe is created by the somewhat colder liquid in the outer pipe, so that hardly any heat losses occur on the way to the radiators.
  • the low heat exchange between supply and return prevents an undesirable temperature level and the resulting temperature shock in directly fired heat generators.
  • the temperature adjustment devices otherwise required for this can be omitted. Unwanted circulation of the medium within a heat circuit during breaks in operation is prevented by the temperature compensation between the flow and return.
  • circulation blocks can be dispensed with.
  • Another advantage is the significantly smaller space requirement of the double pipes in the installed state, since the outgoing and return lines do not have to be installed next to each other, but are designed one inside the other. In this way, hardly more space is required than for a single line with only one wall.
  • the one-piece double pipes have a step at their front ends both in the jacket pipe and in the core pipe, which correspond to the steps at the other end or with a further double pipe such that the double pipes are plugged together. and can be glued, there being smooth transitions on the inside and outside of the walls.
  • These stages thus represent connecting sleeves with matching connecting pins, which enables a precise and seamless assembly of the individual parts without having to use any driving tool.
  • the joining surfaces are designed to be so large that the plastic parts are firmly held together by gluing.
  • the execution of the sleeves and spigots each on the same length on the core and jacket pipe ensures a high accuracy of fit of the pipes, without hidden gaps or joints in the core pipe are possible, which lead to leaks and passage of the transported medium could lead between the core and jacket tube.
  • Double tube angles can be achieved by parallel guidance of interconnected or one-piece core and jacket tubes in a tight bend.
  • any combination and transition from a double pipe to two single pipes or single pipe branches from the core or jacket pipe are possible with the connection system.
  • Such branches or distributors are possible by means of corresponding connecting pieces, which can also be designed at an angle.
  • the pipe diameter can also vary, with the help of reducers that guide the core and jacket pipes evenly to smaller pipe diameters.
  • a double pipe connector from a double pipe line can open into two single pipes, creating an angular branch from a double pipe to a core pipe and a casing pipe connection.
  • Such a transition is e.g. necessary when connecting a radiator, since this does not normally have the hot water connection and the return line in the same place.
  • An advantageous embodiment is the optional attachment of internal and / or external threads on the one-pipe branches. This ensures that the double pipe connection system can be combined with other, conventionally screwed single pipe systems.
  • Branches of core or jacket pipe are also possible in that a double pipe has an angular branch to which a simple piece of pipe can be attached.
  • the branch can either be led from the core tube through the jacket tube or - even more simply - start from the outer jacket tube.
  • such an angular branch can also be designed such that the double pipe line branches into two further double pipe lines or that the double pipe line branches into two single pipe lines.
  • a double pipe reversing piece which is necessary in a circulation line, is also advantageous.
  • the casing tube is only open at one end, the other end is closed.
  • the core tube ends openly in the jacket tube, so that a connection of the two lines is created, which enables a circulation flow from the core tube to the jacket tube or vice versa.
  • permanently hot water can be available at a tap by guiding the hot water in the core pipe to a branch pipe with a tap. If shortly after this branch the double pipe ends in a reversing section from which the hot water flows into the jacket pipe and is returned to the boiler, hot water is always immediately available at the point of use.
  • the double pipes can be made in different cross-sections, whereby connecting pieces and connecting pieces are also possible as reducers with a changing cross-section. Due to the different connection widths on both sides, any pipe cross-section can be combined.
  • the object is further achieved by a method for producing the system described above with the method steps according to claim 13.
  • one-piece plastic, with core, jacket and web parts made of plastic, for example, double pipes produced by extrusion are cut or cut to the desired length.
  • the socket or spigot steps are milled into the jacket and core pipe at the same time on the double pipe ends for each end using a special tool.
  • the corresponding socket and spigot surfaces are then coated with a suitable adhesive.
  • these ends of two pipes to be joined are pushed together over their adhesive-coated sleeves and pegs until a mutual axial stop.
  • a milling cutter for insertion into the double pipe ends of the connecting pins, which has two machining zones arranged concentrically to one another, each consisting of a milling cutter for parallel external machining of the casing tube and the core tube, ie an exact milling to the dimension of the connecting journal, so that a suitable connecting sleeve can be connected to the machined end.
  • a guide pin concentric to the machining zones for centering the milling cutter in the core tube is provided in the forward axial direction, while projecting in the opposite, axial direction, also centrally and simultaneously concentrically to the machining zones, a drill holder for clamping the milling cutter, e.g. in a known chuck of a hand drill is provided.
  • the milling tool is designed in a similar way for insertion into the double pipe ends of the connecting sleeves, namely with an axially protruding guide pin for centering the milling cutter in the core tube and a central, axially protruding rearward drilling machine holder for clamping the milling cutter in a hand drill, but here the two machining zones, which are arranged concentrically to one another and to the guide bolt and the drill holder, are for parallel internal machining of the casing tube and the core tube, ie for precise milling to the size of the connecting sleeves.
  • the respective end-side connecting stages ie connecting sleeves or connecting pins
  • the user only has to clamp the respective tool in his hand drill, axially insert the relatively long guide pin into the core tube of the correspondingly cut double tube, until the end face of the milling cutter teeth is brought close to the end face of the double tube.
  • the hand drill is activated and the milling cutter continues on or into the double pelrohr inserted, up to the axial stop between the pipe end and the depth stop of the tool between the two concentric toothings, whereby the corresponding steps are incorporated precisely in diameter and length.
  • the tool must be removed from the double pipe and replaced with the next tool in order to insert the appropriate steps in the corresponding next double pipe end.
  • Fig. 7 is a double tube reversal piece . in longitudinal section,
  • FIG. 9 shows a longitudinally cut double pipe feed tee with a jacket pipe single pipe branch
  • FIG. 10 a longitudinally cut double pipe tee and a corresponding double pipe reducer
  • FIG. 11 a longitudinally cut double pipe distributor with a single pipe -Core pipe connection and a single pipe jacket pipe connection as well as a corresponding threaded connection nipple
  • 12 an axial section through a milling tool for introducing connecting sleeves into a double pipe
  • a double pipe installation for a closed heating water circuit with two different radiator connections is shown.
  • two single-pipe lines lead to a double-pipe connection piece 10.
  • the line for hot water opens into the core pipe connection 31, while the return line for the cooled water at the casing pipe connection 32 of the double-pipe connection piece 10 (see FIG. 5 ) connected.
  • a double pipe of the required length consisting of several double pipe sections 11 which are plugged together and glued together, is connected.
  • the double pipe sections 11 can optionally be connected by double tube angles 9.
  • a double pipe flow T-piece 13 with a core pipe branch allows the supply to the radiator 19 via a single hot water pipe, consisting of simple pipe sections 7, a single pipe angle 4 and a connecting nipple 18.
  • a double pipe reducer 16 should expediently be provided, since only half the total amount of water is passed through the line leading to the second radiator 19.
  • the branching of hot water and recirculated water takes place here through a double pipe distributor 17, which branches off the core pipe at a 90 ° angle and continues the jacket pipe into a simple pipe section 7. Further necessary fittings are not shown in FIG. and devices such as pumps, valves, etc.).
  • FIG. 2 shows a double pipe installation for a closed hot water circuit with single pipe process water connections.
  • a hot water and a return line lead from a hot water boiler 22 and open into a double pipe connection piece 10.
  • a double pipe consisting of several double pipe sections 11 and possibly connected with double pipe angles 9 for 90 "bypass, leads to a double pipe T-piece 15, from which two double pipe reducers 16 branch off.
  • the pipe cross sections of the branched double pipes again consisting of several double pipe sections 11 and possibly connected with double pipe angles 9, can be smaller since they each only carry half of the total amount of water.
  • the double pipe sections 11 open into a double pipe flow -T piece 13, in which a branch of the core pipe leads to the hot water connection of the wash basin 20.
  • the line shows a single-pipe line, similar to the cold water line 2 shown in FIG. 2, the elements of which are joined together in essentially the same way as those of the double pipe described above.
  • the line consists of a single-pipe connection bracket 8, which has an external thread 27 at one end and a connection pin 24 at the other end.
  • a simple pipe section 7 which can either be very long or can be assembled from several shorter sections, a monotube T-piece 6, a monotube reducer 5 which tapers towards the further end, a monotube angle 4 and finally a one-pipe connection bracket 3, which has an internal thread 28 at the outer end, is arranged.
  • All of these elements each have a connecting sleeve 23 at one end and a matching connecting pin 24 at the other end, so that after the joining, the outer and inner walls have a smooth transition without steps or steps.
  • the front steps, or the connecting sleeves 23 and connecting pins 24, can be introduced from the beginning, ie during extrusion, or subsequently during installation, by means of special milling tools, similar to those for the double tube steps.
  • Fig. 4 shows a double tube angle 9, consisting of a core tube 29 which is connected to a jacket tube 30 via centering webs 25.
  • the double pipe angle 9 kinks the line by 90 ° and has at one end, in each case on the core pipe and on the jacket pipe incorporated connecting sleeves 23, while at the other connecting end connecting pins 24 are incorporated.
  • Fig. 5 shows a double tube connector 10, consisting of a core tube 29 and a jacket tube 30, which has connecting sleeves 23 at the double tube end.
  • the casing tube 30 opens straight or axially into a jacket tube connection 32 with an external thread 27.
  • the core tube 29 is angled by 90 ° and opens into a core tube connection 31 with an external thread 27.
  • connection sleeves 23 are incorporated at one end, connection pins 24 at the other end, each on the corresponding core tube 29 and jacket tube 30.
  • the double-tube reversing piece 12 shown in FIG. 7 consists of a core tube 29 set off in the jacket tube 30, with a connecting pin 24.
  • the core tube 29 ends openly, axially spaced, in the jacket tube 30 which is closed at the top, as a result of which the two lines are connected.
  • a double pipe flow T-piece 13 which has a 90 ° branch 33 in the core tube, which is passed through the jacket tube 30 to the outside and has a connecting sleeve 23 at the end.
  • the double pipe flow T-piece 13 also has connecting sleeves 23 or connecting pins 24 at its ends.
  • FIG. 9 shows a double pipe flow T-piece 14 with a 90 ° branch 34 in the jacket pipe 30.
  • the core pipe 29 is continuous, only the jacket pipe 30 has a jacket pipe branch 34 with an integrated connecting sleeve 23.
  • the double pipe inlet T piece 14 has connecting sleeves 23 and connecting pins 2.
  • the double pipe T-piece 15 has a common 90 ° branch for the core pipe 29 and the casing pipe 30 on.
  • the branch has a connecting sleeve 23, while connecting sleeves 23 and connecting pins 24 are provided at the other two connection ends.
  • the double pipe reducer 16 can be connected to the branch, which tapers in cross section and has connecting sleeves 23 and connecting pins 24.
  • the core tube 29 and the jacket tube 30 are firmly connected by a plurality of centering webs 25 arranged in the circumferential and longitudinal directions.
  • Fig. 11 shows a double pipe distributor 17 and a connecting nipple 18.
  • the core tube is just continued and ends in a core tube connection 35 with a connecting sleeve 23, while the jacket pipe branches off at a 90 ° angle and in a jacket pipe -Connection 36 with connecting sleeve 23 ends.
  • a connecting nipple 18 can be connected to the tubular casing connection 36, which has a connecting pin 24 at the end corresponding to the tubular casing connection 36 and has an external thread 27 at the other end.
  • a wrench receptacle 26 is incorporated in the center of the outer jacket of this connecting nipple 18.
  • Fig. 12 in turn shows a double pipe section 11 after being cut to a certain size and a milling tool 41 for simultaneous milling of a step in the core pipe 29 and casing pipe 30, i.e. for inserting the connecting pin 24. It has a central, pin-shaped drill holder 43, a likewise central guide pin 44 and two coaxial cutter teeth 45 and 46 for the casing tube 30 and the core tube 29, respectively.
  • This cut-to-length piece 11 can be joined together with the suitable connecting sleeves 23 of further individual parts of the double-pipe connecting system.
  • FIG. 13 finally shows the longitudinal section of a double Pipe section 11 after cutting to a certain size and a milling tool 42 for simultaneous milling of a step in the core tube 29 and jacket tube 30, ie for introducing the connecting sleeves 23. It also has a drill holder 43, a guide pin 44 and two cutter teeth 47 or 48 for the casing tube 30 or the core tube 29. So this cut piece can be assembled with the matching connecting pin 24 further individual parts of the double pipe connection system.
  • Double pipe reversing piece 38 Double pipe reversing piece 38.
  • Double pipe reducer (internal machining)
  • hot water boiler (core tube)

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Branch Pipes, Bends, And The Like (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Abstract

L'invention concerne un système à double tube, s'utilisant notamment dans la technique sanitaire, la technique du chauffage, du froid et la technologie des procédés industrielles. Dans ce système, les doubles tubes et les éléments d'assemblage correspondants sont réalisés d'une seule pièce en matière plastique et sont constitués d'un tube central (29), d'un tube extérieur (30) et de nervures de centrage espacées (25). Les éléments de double tube présentent chacun au niveau de leur face, aussi bien dans le tube extérieur (30) que dans le tube central (29), un gradin le long de la périphérie du tube, formant des manchons de raccordement (23) ou des tenons de raccordement (24) qui correspondent aux gradins à l'autre extrémité ou au niveau d'un autre double tube, de sorte que les doubles tubes puissent être emboîtés ou collés, en créant des jonctions lisses à l'intérieur comme à l'extérieur des parois. L'invention concerne en outre un procédé de production dudit système et des outils pour la mise en oeuvre dudit procédé.
EP98907886A 1997-02-11 1998-02-09 Systeme a double tube, procede et outils pour la production dudit systeme Withdrawn EP0960302A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE1997105073 DE19705073C1 (de) 1997-02-11 1997-02-11 Doppelrohrsystem
DE19705073 1997-02-11
PCT/DE1998/000345 WO1998035178A1 (fr) 1997-02-11 1998-02-09 Systeme a double tube, procede et outils pour la production dudit systeme

Publications (1)

Publication Number Publication Date
EP0960302A1 true EP0960302A1 (fr) 1999-12-01

Family

ID=7819851

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98907886A Withdrawn EP0960302A1 (fr) 1997-02-11 1998-02-09 Systeme a double tube, procede et outils pour la production dudit systeme

Country Status (4)

Country Link
EP (1) EP0960302A1 (fr)
AU (1) AU6609298A (fr)
DE (1) DE19705073C1 (fr)
WO (1) WO1998035178A1 (fr)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19755293B4 (de) * 1997-12-12 2006-07-27 Johann Schillinger Warmwasserversorgungs- und Zirkulationssystem
JP4776791B2 (ja) 2000-03-31 2011-09-21 カルソニックカンセイ株式会社 二重管端末加工方法
DE10164661B4 (de) * 2001-12-31 2005-10-20 Michael Schick Wärmetransportsystem
US7213787B2 (en) * 2005-06-07 2007-05-08 The Boeing Company Valves for annular conduits including aircraft fuel conduits and associated systems and methods
GB2471797B (en) * 2005-10-17 2011-04-20 Lee Mckeith Central heating system - endstop valve
GB2493545B (en) * 2011-08-11 2013-09-11 Technip France T-piece preformer
NO338805B1 (no) * 2013-05-10 2016-10-24 Jesk As Anordning ved ventilasjonsrør
EP2997322B1 (fr) 2013-05-15 2020-12-23 Carrier Corporation Procédé de fabrication d'ensemble à collecteurs multiples à orifices de communication interne
GB201601848D0 (en) * 2016-02-02 2016-03-16 Equitherm Ltd Water systems
SE541148C2 (en) * 2016-10-18 2019-04-16 Hammardal Bygg & Vvs Ab System for hot water circulation and method therefore
EP3742057A1 (fr) * 2019-05-21 2020-11-25 Georg Fischer JRG AG Récupération de chaleur

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Publication number Priority date Publication date Assignee Title
DE3105406A1 (de) * 1981-02-14 1982-09-02 Hergen 3100 Celle Sandl Konische selbstdichtende kernrohrmuffenverbindung und zentriereinrichtung fuer doppelrohre (doppelrohrsysteme)
DE8405746U1 (de) * 1984-02-24 1984-05-24 Polymelt Rolf Hansen GmbH, 8922 Peiting Verteilerstueck aus thermoplastischem kunststoff, insbesondere fuer eine warmwasserheizung
EP0207015A3 (fr) * 1985-06-18 1990-05-02 DITTA PACETTI ANTONIO di Silvano & Andrea Pacetti Collecteur ventilé pour réseau de distribution du gaz pour usage domestique ou autre
DE8533721U1 (fr) * 1985-11-30 1988-04-14 Fehlings, Gerd, 4407 Emsdetten, De
US4886305A (en) * 1988-08-12 1989-12-12 Fibercast Company Double containment pipe fittings and apparatus to adhesively install the same

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO9835178A1 *

Also Published As

Publication number Publication date
DE19705073C1 (de) 1998-11-12
AU6609298A (en) 1998-08-26
WO1998035178A1 (fr) 1998-08-13

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