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WO2013141729A2 - Heat exchanger connection pipe stub - Google Patents

Heat exchanger connection pipe stub Download PDF

Info

Publication number
WO2013141729A2
WO2013141729A2 PCT/PL2013/000034 PL2013000034W WO2013141729A2 WO 2013141729 A2 WO2013141729 A2 WO 2013141729A2 PL 2013000034 W PL2013000034 W PL 2013000034W WO 2013141729 A2 WO2013141729 A2 WO 2013141729A2
Authority
WO
WIPO (PCT)
Prior art keywords
pipe stub
heat exchanger
pipe
jacket
connection
Prior art date
Application number
PCT/PL2013/000034
Other languages
French (fr)
Other versions
WO2013141729A3 (en
Inventor
Ariel TOMICKI
Original Assignee
Aic Sp. Z O.O.
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 Aic Sp. Z O.O. filed Critical Aic Sp. Z O.O.
Publication of WO2013141729A2 publication Critical patent/WO2013141729A2/en
Publication of WO2013141729A3 publication Critical patent/WO2013141729A3/en

Links

Classifications

    • 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
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • F28F9/0256—Arrangements for coupling connectors with flow lines
    • F28F9/0258—Arrangements for coupling connectors with flow lines of quick acting type, e.g. with snap action
    • 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
    • F16L41/00—Branching pipes; Joining pipes to walls
    • F16L41/08—Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of a wall or to the axis of another pipe
    • 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
    • F24D19/00—Details
    • F24D19/0002—Means for connecting central heating radiators to circulation pipes
    • F24D19/0017—Connections between supply and inlet or outlet of central heating radiators
    • 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
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • F28F9/0248—Arrangements for sealing connectors to header boxes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/08—Fastening; Joining by clamping or clipping
    • F28F2275/085—Fastening; Joining by clamping or clipping with snap connection

Definitions

  • the invention concerns a heat exchanger connection pipe stub. It is used as an element enabling the connection of the inlet and/or outlet pipes supplying/ collecting one of the heat exchange agents to/ from the heat exchange chamber in heat exchangers of different types. In particular, it is intended for connecting water pipes to assembly openings in the jacket encasing the water chamber of fired heat exchangers used in condensing boilers, e.g. in domestic central heating installations.
  • heat exchanger connection pipe stubs are in the form of a cylindrical body fitted on one end with a coupling for connecting it to the pipe feeding one of the heat exchange agents, water in particular, into the heat exchanger.
  • the body of the connection pipe stub is permanently connected to the assembly opening in the heat exchanger jacket by welding.
  • the structure of the pipe stub enables it to be severably connected to the heat exchanger with threaded connectors and sealings of various types used.
  • an additional element such as a threaded bushing or pin, is welded or heat-sealed to the assembly opening in the heat exchanger jacket and the pipe stub is connected thereto.
  • connection pipe stub is permanently connected to the heat exchanger jacket on the side of the jacket, and on the other side it has a connection unit for the pipe introduced into the pipe stub body, formed of a double flange on the outer surface of the pipe with an o-ring seal placed under the connection unit, and a wire buckle fitted in the sealing socket.
  • connection unit for the pipe introduced into the pipe stub body formed of a double flange on the outer surface of the pipe with an o-ring seal placed under the connection unit, and a wire buckle fitted in the sealing socket.
  • WO2008/143097 the connection of two pipe elements is achieved by way of specially shaped and threaded ends of the connected pipes. Though the embodiment proposes a new way to connect two pipe elements to each other, it does not solve the problem of connecting a pipe element to the flat or cylindrical surface of the heat exchanger jacket.
  • connection pipe stubs A drawback of the known embodiments of connection pipe stubs is the need to use welding techniques in order to connect the pipe element with the heat exchanger jacket, which prolongs the assembly process and may cause disadvantageous changes in the material of welded elements.
  • connection pipe stub according to the invention in the form of a body fitted with pipe connection of any type on one side, is characterised in that its body has an in- driven end on the side of the assembly opening in the heat exchanger jacket.
  • the pipe stub body is fitted with a flange below the in-driven end, where the top surface of the flange corresponds to the shape of the jacket surface.
  • the pipe stub end is given the form of resilient hook- shaped fasteners obtained through notches in the flanged-out annular end of the body.
  • the expansion element is fitted along the inner circumference of the in-driven end.
  • the expansion element is given the form of a rigid bushing.
  • the expansion element is given the form of a resilient ring.
  • the advantage of the solution according to the invention consists in ensuring swift, effective and secure connection between the connection pipe stub and the assembly opening in the heat exchanger jacket, and in avoiding welding shrinkages which form when the connection element is welded to the heat exchanger jacket.
  • An exemplary embodiment of the pipe stub according to the invention is shown in a drawing, where Fig. 1 presents longitudinal section of the pipe stub in the variant with the resilient ring, Fig. 2 shows longitudinal section of the pipe stub in the variant with the rigid bushing, and Fig. 3 depicts the connection between the pipe stub and the heat exchanger jacket.
  • connection pipe stub is given the form of a plastic cylindrical body KK with a pipe connection element ZR of any type fitted on one side to be connected to the pipe supplying water intended for heating the water chamber of the fired pipe heat exchanger.
  • the connection may be of the flange, thread, quick-fit, or any other preferred type.
  • the inner and outer diameters of the pipe stub can be equal along its whole length, or change either in steps or smoothly, depending on the need. In one of the embodiment variants, shown on Fig. 1 and Fig. 3, the inner diameter of the pipe stub increases smoothly towards the jacket on the side of the connection to the heat exchanger jacket P, thus resulting in a conical cross section.
  • the inner diameter of the in-driven end is constant, and the expansion element ER is given the form of a rigid bushing inserted inside the in-driven end of the body KK.
  • the flange K formed along the external circumference of the body KK below the fasteners Z has a groove on its top surface, accommodating an annular U seal of e.g. the o-ring type.
  • the top surface of the flange K may be either flat or cylindrical, depending on whether the surface of the heat exchanger jacket P to which the pipe stub is to be fitted is flat or cylindrical.
  • the end of the pipe stub on the side of the heat exchanger jacket P may be either cross-wise or skew, depending on the needs and shape of the heat exchanger jacket P.
  • Skew ending of the in-driven end of the pipe stub body KK is used particularly in heat exchangers with the conical jacket encasing the water chamber, or if the pipe stub is to be fitted at an angle instead of being horizontally positioned to the jacket P.
  • the lengths as well as inner and outer diameters of the pipe stub, the number of notches N, fasteners Z, their shapes in the in-driven end, and the materials they are made of may differ depending on the needs.
  • the in-driven end of the pipe stub is inserted into the assembly opening in the heat exchanger jacket P, which makes the fasteners Z yield.
  • the fasteners spring back to their original position, thus preventing spontaneous detachment of the pipe stub from the jacket P.
  • the expansion element ER in the form of a resilient ring or rigid bushing is introduced. The element presses the fasteners Z to the sides preventing their slipping out of the assembly opening in the jacket P, thus additionally securing the connection.
  • the tightness of the connection between the pipe stub and the heat exchanger jacket P is secured with a U-shape o-ring seal pressed to the jacket surface P with the flange K having a groove accommodating the U seal.

Landscapes

  • 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)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
  • Details Of Fluid Heaters (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

The connection pipe stub for a heat exchanger in the form of a body (KK) fitted with a pipe connection (ZR) of any type on one side, characterised in that its body (KK) has an in-driven end on the side of the assembly opening in the heat exchanger jacket (P).

Description

Heat exchanger connection pipe stub
The invention concerns a heat exchanger connection pipe stub. It is used as an element enabling the connection of the inlet and/or outlet pipes supplying/ collecting one of the heat exchange agents to/ from the heat exchange chamber in heat exchangers of different types. In particular, it is intended for connecting water pipes to assembly openings in the jacket encasing the water chamber of fired heat exchangers used in condensing boilers, e.g. in domestic central heating installations.
In known embodiments, heat exchanger connection pipe stubs are in the form of a cylindrical body fitted on one end with a coupling for connecting it to the pipe feeding one of the heat exchange agents, water in particular, into the heat exchanger. On the other hand, the body of the connection pipe stub is permanently connected to the assembly opening in the heat exchanger jacket by welding. In other known embodiments, the structure of the pipe stub enables it to be severably connected to the heat exchanger with threaded connectors and sealings of various types used. In such embodiments an additional element, such as a threaded bushing or pin, is welded or heat-sealed to the assembly opening in the heat exchanger jacket and the pipe stub is connected thereto.
Known from European patent application No. EP2154447 is a structural solution of the inlet and outlet pipes in a heat exchanger, according to which the cylindrical body of the connection pipe stub is permanently connected to the heat exchanger jacket on the side of the jacket, and on the other side it has a connection unit for the pipe introduced into the pipe stub body, formed of a double flange on the outer surface of the pipe with an o-ring seal placed under the connection unit, and a wire buckle fitted in the sealing socket. Also known is the embodiment disclosed in international PCT patent application published under number WO2008/143097, where the connection of two pipe elements is achieved by way of specially shaped and threaded ends of the connected pipes. Though the embodiment proposes a new way to connect two pipe elements to each other, it does not solve the problem of connecting a pipe element to the flat or cylindrical surface of the heat exchanger jacket.
A drawback of the known embodiments of connection pipe stubs is the need to use welding techniques in order to connect the pipe element with the heat exchanger jacket, which prolongs the assembly process and may cause disadvantageous changes in the material of welded elements.
The connection pipe stub according to the invention, in the form of a body fitted with pipe connection of any type on one side, is characterised in that its body has an in- driven end on the side of the assembly opening in the heat exchanger jacket.
Preferably, the pipe stub body is fitted with a flange below the in-driven end, where the top surface of the flange corresponds to the shape of the jacket surface.
There is a groove formed on the top surface of the flange to accommodate the seal.
In preferable embodiment, the pipe stub end is given the form of resilient hook- shaped fasteners obtained through notches in the flanged-out annular end of the body.
Most preferably, the expansion element is fitted along the inner circumference of the in-driven end.
In one variant of the pipe stub, the expansion element is given the form of a rigid bushing.
In another variant of the pipe stub, the expansion element is given the form of a resilient ring.
The advantage of the solution according to the invention consists in ensuring swift, effective and secure connection between the connection pipe stub and the assembly opening in the heat exchanger jacket, and in avoiding welding shrinkages which form when the connection element is welded to the heat exchanger jacket. An exemplary embodiment of the pipe stub according to the invention is shown in a drawing, where Fig. 1 presents longitudinal section of the pipe stub in the variant with the resilient ring, Fig. 2 shows longitudinal section of the pipe stub in the variant with the rigid bushing, and Fig. 3 depicts the connection between the pipe stub and the heat exchanger jacket.
In the exemplary embodiment, the connection pipe stub is given the form of a plastic cylindrical body KK with a pipe connection element ZR of any type fitted on one side to be connected to the pipe supplying water intended for heating the water chamber of the fired pipe heat exchanger. The connection may be of the flange, thread, quick-fit, or any other preferred type. The inner and outer diameters of the pipe stub can be equal along its whole length, or change either in steps or smoothly, depending on the need. In one of the embodiment variants, shown on Fig. 1 and Fig. 3, the inner diameter of the pipe stub increases smoothly towards the jacket on the side of the connection to the heat exchanger jacket P, thus resulting in a conical cross section. Along the external circumference of the pipe stub, on the side of the heat exchanger jacket P, there is an annularflange K formed in the pipe stub body KK, and above the flange the end of the body KK is flanged-out forming a ring, with its side wall inclined and four notches N incised along its circumference. In this way four hook-shaped fasteners Z are formed in between the notches, which make the in-driven end of the pipe stub. Along the inner circumference of the in-driven end of the body KK with fasteners Z there is an expansion element ER in the form of a resilient ring. The resilience of this pressing element is achieved by an excision in the closed annular element. In another variant of stub embodiment shown on Fig. 2 the inner diameter of the in-driven end is constant, and the expansion element ER is given the form of a rigid bushing inserted inside the in-driven end of the body KK. In both variants the flange K formed along the external circumference of the body KK below the fasteners Z has a groove on its top surface, accommodating an annular U seal of e.g. the o-ring type. The top surface of the flange K may be either flat or cylindrical, depending on whether the surface of the heat exchanger jacket P to which the pipe stub is to be fitted is flat or cylindrical. The end of the pipe stub on the side of the heat exchanger jacket P may be either cross-wise or skew, depending on the needs and shape of the heat exchanger jacket P. Skew ending of the in-driven end of the pipe stub body KK is used particularly in heat exchangers with the conical jacket encasing the water chamber, or if the pipe stub is to be fitted at an angle instead of being horizontally positioned to the jacket P. Similarly, the lengths as well as inner and outer diameters of the pipe stub, the number of notches N, fasteners Z, their shapes in the in-driven end, and the materials they are made of may differ depending on the needs.
In order to connect the pipe stub to the heat exchanger jacket P the in-driven end of the pipe stub is inserted into the assembly opening in the heat exchanger jacket P, which makes the fasteners Z yield. Once the pipe stub end is fully driven, the fasteners spring back to their original position, thus preventing spontaneous detachment of the pipe stub from the jacket P. Then, the expansion element ER in the form of a resilient ring or rigid bushing is introduced. The element presses the fasteners Z to the sides preventing their slipping out of the assembly opening in the jacket P, thus additionally securing the connection. The tightness of the connection between the pipe stub and the heat exchanger jacket P is secured with a U-shape o-ring seal pressed to the jacket surface P with the flange K having a groove accommodating the U seal.
The examples described above do not exhaust the variant possibilities for the embodiment demonstrating the features of the presented invention.

Claims

Patent claims
1. Heat exchanger connection pipe stub in the form of a body fitted with a pipe connection of any type on one side characterised in that its body (KK) has an in-driven end on the side of the assembly opening in the heat exchanger jacket (P).
2. The pipe stub according to Claim 1 characterised in that the pipe stub body (KK) is fitted with a flange (K) below the in-driven end, where the top surface of the flange corresponds to the shape of the jacket surface (P).
3. The pipe stub according to Claim 2 characterised in that there is a groove formed on the top surface of the flange (K) to accommodate the seal (U).
4. The pipe stub according to Claims 1 or 2 or 3 characterised in that the pipe stub end is given the form of resilient hook-shaped fasteners (Z) obtained through notches (N) in the flanged-out annular end of the body (KK).
5. The pipe stub according to Claims 1 to 4 characterised in that an expansion element (ER) is fitted along the inner circumference of the in-driven end.
6. The pipe stub according to Claim 5 characterised in that the expansion element is given the form of a rigid bushing.
7. The pipe stub according to Claim 5 characterised in that the expansion element is given the form of a resilient ring.
PCT/PL2013/000034 2012-03-22 2013-03-15 Heat exchanger connection pipe stub WO2013141729A2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
PLP.398573 2012-03-22
PL398573A PL398573A1 (en) 2012-03-22 2012-03-22 Connection sleeve of the heat exchanger

Publications (2)

Publication Number Publication Date
WO2013141729A2 true WO2013141729A2 (en) 2013-09-26
WO2013141729A3 WO2013141729A3 (en) 2013-11-28

Family

ID=48225105

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/PL2013/000034 WO2013141729A2 (en) 2012-03-22 2013-03-15 Heat exchanger connection pipe stub

Country Status (2)

Country Link
PL (1) PL398573A1 (en)
WO (1) WO2013141729A2 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109296836A (en) * 2018-11-30 2019-02-01 常州常发制冷科技有限公司 Screw-type sealed fitting and its installation method
EP3486596A1 (en) 2017-03-01 2019-05-22 AIC Spólka Akcyjna A pipe fitting for connecting pipes to a device, especially a stub pipe for a heat exchanger
EP4358234A1 (en) * 2022-10-17 2024-04-24 Borgwarner Inc. Cooling module for batteries of an electric or hybrid vehicle

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008143097A1 (en) 2007-05-18 2008-11-27 Daikin Industries, Ltd. Bite type pipe coupling, refrigeration device, and water heating device
EP2154447A2 (en) 2008-08-14 2010-02-17 BSH Bosch und Siemens Hausgeräte GmbH Inlet and outlet pipe for a continuous-flow heater

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US4773474A (en) * 1987-08-12 1988-09-27 Modine Manufacturing Company Snap on fillerneck assembly for radiators
DE4407262A1 (en) * 1994-01-31 1995-04-20 Fichtel & Sachs Ag Connection stub on a cylindrical body
GB9712290D0 (en) * 1997-06-12 1997-08-13 Guest John D Improvements in or relating to collets for locking tubes in coupling bodies
DE10032010C1 (en) * 2000-07-01 2001-09-13 Hummel Anton Verwaltung Connection fitting for a pipe etc. through a housing wall has a division near the angled support surface for the limit ring to allow for large wall thickness differences
DE10111931C2 (en) * 2001-03-13 2003-02-13 Eaton Fluid Power Gmbh Pipe connecting device
DE102010032694B3 (en) * 2010-07-29 2012-02-16 Gea Energietechnik Gmbh Cooling tower water distribution

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008143097A1 (en) 2007-05-18 2008-11-27 Daikin Industries, Ltd. Bite type pipe coupling, refrigeration device, and water heating device
EP2154447A2 (en) 2008-08-14 2010-02-17 BSH Bosch und Siemens Hausgeräte GmbH Inlet and outlet pipe for a continuous-flow heater

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3486596A1 (en) 2017-03-01 2019-05-22 AIC Spólka Akcyjna A pipe fitting for connecting pipes to a device, especially a stub pipe for a heat exchanger
CN109296836A (en) * 2018-11-30 2019-02-01 常州常发制冷科技有限公司 Screw-type sealed fitting and its installation method
EP4358234A1 (en) * 2022-10-17 2024-04-24 Borgwarner Inc. Cooling module for batteries of an electric or hybrid vehicle

Also Published As

Publication number Publication date
WO2013141729A3 (en) 2013-11-28
PL398573A1 (en) 2013-09-30

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