GB2403279A - Tube connection allowing differential movement - Google Patents

Tube connection allowing differential movement Download PDF

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Publication number
GB2403279A
GB2403279A GB0314880A GB0314880A GB2403279A GB 2403279 A GB2403279 A GB 2403279A GB 0314880 A GB0314880 A GB 0314880A GB 0314880 A GB0314880 A GB 0314880A GB 2403279 A GB2403279 A GB 2403279A
Authority
GB
United Kingdom
Prior art keywords
tube
end region
recess
tubes
further recess
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Withdrawn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
GB0314880A
Other versions
GB0314880D0 (en
Inventor
David Llewellyn
Ramesh Parmer
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.)
Dana Automotive Ltd
Original Assignee
Dana Automotive Ltd
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 Dana Automotive Ltd filed Critical Dana Automotive Ltd
Priority to GB0314880A priority Critical patent/GB2403279A/en
Publication of GB0314880D0 publication Critical patent/GB0314880D0/en
Publication of GB2403279A publication Critical patent/GB2403279A/en
Withdrawn legal-status Critical Current

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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
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/14—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
    • F16L13/16—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling the pipe joint consisting of overlapping extremities having mutually co-operating collars
    • F16L13/161—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling the pipe joint consisting of overlapping extremities having mutually co-operating collars the pipe or collar being deformed by crimping or rolling
    • 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—Constructive types of pipe joints not provided for in groups F16L13/00 - F16L23/00 ; Details of pipe joints not otherwise provided for, e.g. electrically conducting or insulating means
    • F16L25/10—Sleeveless joints between two pipes, one being introduced into the other
    • 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
    • F16L27/00—Adjustable joints, Joints allowing movement
    • F16L27/02—Universal joints, i.e. with mechanical connection allowing angular movement or adjustment of the axes of the parts in any direction

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Quick-Acting Or Multi-Walled Pipe Joints (AREA)

Abstract

A connection 10 between first and second tubes 11, 12, comprises an end region 14 of the first tube 11 being configured to receive within it, an end region 18 of the second tube 12. The end region 18 of the second tube 12 includes a first circumferential recess 19 in which is provided a ring seal 24 which engages with an inside surface of the first tube 11 in sealing engagement. A further recess 22 having a first end surface 28, and a second end surface 30 is provided in the second tube 12, which is engageable with an end edge 16 of the first tube 11 to restrict outward movement of the end region 18 of the second tube 12 from the end region 14 of the first tube 11. The end edge 16 of the first tube 11 is deformed into the further recess 22 subsequently to the end region 18 of the second tube 12 being received within the end region 14 of the first tube 11. The first and second tubes 11,12 are preferably thin walled metallic tubes.

Description

PATENTS ACT 1977 DJL/A10917GB Title: Tube Connection
Description of Invention s
This invention related to a connection between first and second tubes, and to a method of forming such a connection.
In some applications where two tubes are connected together end to end, it is desirable to allow for some differential movement between the two tubes, both axially, but also rotationally and angularly, particularly where the tubes are for use in applications where tolerances allow for significant variations in dimensions and relative positions between components. For example, in engine environments, e.g. for automotives, the distance between and relative positions between two components between which a fluid may be required to extend, may vary substantially from one engine environment to another. Also, the fluid line may experience changes in engine use, due to mechanical vibrations and/or thermal effects.
According to a first aspect of the invention we provide a connection between first and second tubes, an end region of the first tube being configured to receive within it, an end region of the second tube, the end region of the second tube including a first circumferential recess in which is provided a ring seal which engages with an inside surface of the first tube in sealing engagement, a further recess having a first end surface, and a second end surface which is engageable with an end edge of the first tube to restrict outward movement of the end region of the second tube from the end region of the first tube, the end edge of the first tube being deformed into the further recess subsequently to the end region of the second tube being received within the end region of the first tube. l
The connection of the invention may accommodate different requirements, as some telescoping of the first and second tubes will be permitted, which may depend upon the distance between the first and second end surfaces, and the nature of the deformation of the end edge of the first tube into the further recess. Also, the first and second tubes may relatively rotate axially, and some angular movement of the axis of the end region of the first tube relative to the axis of the end region of the second tube. In each case, the ring seal, which may be an "o" ring seal, or another formed ring seal, will maintain a seal between the first and second tubes within the limits of movement permitted by the nature of the deformed end edge of the first tube and the further recess. By virtue of the provision of the further recess, a tool for deforming the end edge of the first tube may readily be accommodated, to provide the construction of the invention.
To improve the seal between the first and second tubes, and to increase the extent of relative movement permitted by the connection, there may be provided a second recess in the end region of the second tube which receives a second ring seal, which may again be an "o" ring or other formed seal, the second recess being positioned between the first recess and the further recess into which the first tube end edge is deformed.
The first tube is preferably a thin walled metallic tube having a nominal internal diameter, but the internal diameter of the first tube may be greater along the end region of the tube. Thus the end region of the second tube may have a nominal external diameter similar to the nominal internal diameter of the first tube. In a preferred arrangement, the second tube is a thin walled metallic tube, in which case the first recess, and the second recess where provided, and the further recess of the second tube may be provided by forming of the tube wall.
Depending on the relative axial extents of the end regions of the first and second tubes, inward movement of the end region of the second tube into the end region of the first tube may be restricted by an end edge of the second tube engaging an abutment surface provided where the internal diameter of the end region of the first tube reduces to the nominal internal diameter of the first tube.
Alternatively, the first end surface of the further recess may provide an abutment surface which is engageable with the end edge of the first tube to restrict inward movement of the end region of the second tube into the end region of the first tube.
In each case, desirably the distance between the first and second end surfaces of the further recess is at least twice the wall thickness of the first tube, and preferably significantly more, to permit of relative axial movement between the first and second tubes.
According to a second aspect of the invention we provide a method of making a connection between first and second tubes, where an end region of the first tube is configured to receive within it, an end region of the second tube, the method including providing in an end region of the second tube, a first circumferential recess, providing in the first recess a ring seal, providing in the end region of the second tube between the first recess and a main body of the tube, a further recess having a first end surface and a second end surface, the method including inserting the end region of the second tube into the end region of the first tube so that the "o" ring seal engages with an inside surface of the first tube in sealing engagement, until the further recess of the second tube is located adjacent an end edge of the first tube, and deforming the end edge of the first tube so that the second abutment surface is engageable with the deformed end edge of the first tube to restrict outward movement of the end region of the second tube from the end region of the first tube.
Embodiments of the invention will now be described with reference to the accompanying drawing which is a schematic cross sectional view through a connection made in accordance with the invention.
Referring to the drawing, a connection 10 between a first tube 11 and a second tube 12 is illustrated.
The first tube 11 is a thin walled metallic tube, an end region 14 of which has a greater internal diameter dl than the nominal internal diameter d of the remaining main body 15 of the first tube 11. The end region 14, but not an end edge 16 of the end region, as hereinafter explained, may be formed to this configuration during fabrication.
The second tube 12 also is a thin walled metallic tube which has a nominal external diameter D which is similar to the inside diameter dl of the end region 14 of the first tube 11. An end region 18 of the second tube 12 is provided with a first recess 19 adjacent an end edge 20 of the second tube 12, a second recess 21 inwardly of first recess 19 along the end region 18, and a further recess 22 inwardly of the first and second recesses 19, 21 along the end region 18.
Within the first recess 19 there is provided an "o" ring seal 24, and similarly in the second recess 21 there is provided an "o" ring seal 25, the seals 24, 25 typically are made of an elastomeric material in a toroidal configuration, as is well established. The seals 24, 25 each provide a seal between the first and second tube end regions 14, 18 by engaging in their respective recesses 19, 21 in a sealing manner, and with the inside surface of the end region 14 of the first tube 11. The relative dimensions of the internal first tube end region 14 diameter dl and the external second tube diameter D, and the size and thickness of the "o" ring seals 24, 25 are carefully chosen so that some relative movement of the tubes 11, 12 such as to misalign their respective axes, or at least an axis A of the end region 14 of the first tube 11 and an axis B of the end region 18 of the second tube 12, can be tolerated whilst a seal between the two tubes is maintained.
It can be seen from the drawing that the end region 18 of the second tube 12 is inserted into the end region 14 of the first tube 11 until the further recess 22 is located adjacent the end edge 16 of the first tube 11.
Subsequent to inserting the end region 18 of the second tube 12 into the end region 18 of the first tube 11, the end edge 16 of the first tube 11 is deformed into the further recess 22 of the second tube 12. The further recess 22 is bounded between a first end surface 28 located near to the second recess 21 and a second end surface 30 located inwardmost of the end of the second tube 12.
The end edge 16 of the first tube 11 may be deformed inwardly of the further recess 22 around its entire periphery e.g. by crimping, or may be deformed inwardly only at discrete positions about the periphery, e.g. by staking, as desired.
In each case, the nature of the deformed end edge 16 permits of relative axial movement between the respective first and second tubes 11, 12, but in this example, inward movement of the second tube 12 into the first tube 11 is restricted by the deformed end edge 16 engaging with the first end surface 28, whilst outward movement of the second tube 12 from the first tube 11 is restricted by the deformed end edge 16 engaging the second end surface 30.
Thus the axial extent of the further recess 22 between the first and second end surfaces 28, 30 determines the amount of relative axial movement permitted between the first and second tubes 11, 12.
In another example though, inward movement of the end region 18 of the second tube 12 into the end region 14 of the first tube 11 is restricted by the end edge 20 of the second tube 12, engaging with an abutment surface 17 provided where the internal diameter dl of the end region 14 of the first tube 11, reduces to the nominal diameter d of the first tube 11.
In each case, preferably the distance between the first and second end surfaces 28, 30 of the further recess 22 is at least twice the wall thickness of the first tube 11, and preferably significantly more, to permit of relative axial movement between the first and second tubes 11, 12.
Of course, provided that the end edge 16 is inwardly deformed into the further recess 22 uniformly circumferentially of the further recess 22, relative axial rotation between the two tubes 11, 12 will be permitted, whilst the seals 24,25 will maintain the seal between the two tubes 11, 12.
Various modifications may be made without departing from the scope of the invention.
For example, in another embodiment only one recess 19 for a single "o" lO ring seal may be provided in the end region 18 of the second tube 12, or more than the two recess 19, 21 shown may be provided. In another example, instead of one or more "o" ring seals 24, 25, other shapes of ring seals, but preferably pre-formed seals, may be provided. It is envisaged that the ring seal or seals may be configured to permit of greater relative movements between the first and second tubes 11, 12 whilst retaining sealing, than can be achieved with "o" ring seals 24, 25.
The end region 14 of the first tube 11 need not have a greater internal diameter dl than the nominal external diameter D of the second tube 12, but in that case, at least the end region 18 of the second tube 12 would need to be of smaller diameter than the internal diameter of the first tube 11 which may provide an unacceptable restriction to fluid flow through the tube connection 10.
The first tube 11 need not be a thin walled metallic tube but may otherwise be fabricated but the end edge 16 of the tube 11 would need to be deformable after the end region 18 of the second tube 12 is inserted into the end region 14 of the first tube, into the further recess 22.
The second tube 12 need not be a thin walled metallic tube but may otherwise be fabricated, in which case the first recess 19, and the second recess 21 where provided, and the further recess 22, may be provided in the second tube 12 wall other than by forming the thin wall as described above.
The invention may be applied where fluid, such as oil or water or Mel, is conveyed through the first and second tubes 11, 12, via the connection 10, S but in another arrangement may be provided where fluid is present externally of the tubes 11, 12 and it is desired to provide a tube connection where fluid is prevented from entering the tubes by the seal or seals 24, 25.
The features disclosed in the foregoing description, or the following claims, or the accompanying drawings, expressed in their specific forms or in terms of a means for performing the disclosed function, or a method or process for attaining the disclosed result, as appropriate, may, separately, or in any combination of such features, be utilised for realising the invention in diverse forms thereof.

Claims (16)

1. A connection between first and second tubes, an end region of the first tube being configured to receive within it, an end region of the second tube, the end region of the second tube including a first circumferential recess in which is provided a ring seal which engages with an inside surface of the first tube in sealing engagement, a further recess having a first end surface, and a second end surface which is engageable with an end edge of the first tube to restrict outward movement of the end region of the second tube from the end region of the first tube, the end edge of the first tube being deformed into the further recess subsequently to the end region of the second tube being received within the end region of the first tube.
2. A connection according to claim 1 wherein some telescoping of the first and second tubes is permitted, whilst the ring seal maintains a seal between the first and second tubes within the limits of movement permitted by the nature of the deformed end edge of the first tube and the further recess.
3. A connection according to claim 1 or claim 2 wherein the first and second tubes are relatively rotatable axially whilst the ring seal maintains a seal between the first and second tubes within the limits of movement permitted by the nature of the deformed end edge of the first tube and the further recess.
4. A connection according to any one of claims 1 to 3 wherein the connection permits of some angular movement of the axis of the end region of the first tube relative to the axis of the end region of the second tube whilst the ring seal maintains a seal between the first and second tubes within the limits of movement permitted by the nature of the deformed end edge of the first tube and the further recess.
5. A connection according to any one of the preceding claims wherein a second recess is provided in the end region of the second tube which receives a second ring seal, the second recess being positioned between the first recess and the further recess into which the first tube end edge is deformed.
6. A connection according to any one of the preceding claims wherein the or each ring seal is an "o" ring seal.
7. A connection according to any one of the preceding claims wherein the first tube is a thin walled metallic tube having a nominal internal diameter, the internal diameter of the first tube being greater along the end region of the tube.
8. A connection according to claim 7 wherein the end region of the second tube has a nominal external diameter similar to the internal diameter of the first tube.
9. A connection according to any one of the preceding claims wherein the second tube is a thin walled metallic tube, the first recess and the further recess of the second tube being provided by forming of the tube wall.
10. A connection according to any one of the preceding claims wherein inward movement of the end region of the second tube into the end region of the first tube is restricted by an end edge of the second tube engaging an abutment surface provided where the internal diameter of the end region of the first tube reduces to the nominal internal diameter of the first tube.
11. A connection according to any one of claims 1 to 9 wherein the first end surface of the further recess provides an abutment surface which is engageable with the end edge of the first tube to restrict inward movement of the end region of the second tube into the end region of the first tube.
12. A connection according to any one of the preceding claims wherein the distance between the first and second end surfaces of the further recess is at least twice that of the wall thickness of the first tube, and preferably significantly more, to permit of relative axial movement between the first and second tubes.
13. A connection between first and second tubes substantially as hereinbefore described with reference to and/or as shown in the accompanying drawing.
14. A method of making a connection between first and second tubes, where an end region of the first tube is configured to receive within it, an end region of the second tube, the method including providing in an end region of the second tube, a first circumferential recess, providing in the first recess a ring seal, providing in the end region of the second tube between the first recess and a main body of the tube, a further recess having a first end surface and a second end surface, the method including inserting the end region of the second tube into the end region of the first tube so that the ring seal engages with an inside surface of the first tube in sealing engagement, until the further recess of the second tube is located adjacent an end edge of the first tube, and deforming the end edge of the first tube so that so that second abutment surface is engageable with the deformed end edge of the first tube to restrict outward movement of the end region of the second tube from the end region of the first tube.
1S. A method of making a connection between first and second tubes substantially as hereinbefore described with reference to the accompanying drawing.
16. Any novel feature or novel combination of features described herein and/or as shown in the accompanying drawing.
GB0314880A 2003-06-26 2003-06-26 Tube connection allowing differential movement Withdrawn GB2403279A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB0314880A GB2403279A (en) 2003-06-26 2003-06-26 Tube connection allowing differential movement

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB0314880A GB2403279A (en) 2003-06-26 2003-06-26 Tube connection allowing differential movement

Publications (2)

Publication Number Publication Date
GB0314880D0 GB0314880D0 (en) 2003-07-30
GB2403279A true GB2403279A (en) 2004-12-29

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB0314880A Withdrawn GB2403279A (en) 2003-06-26 2003-06-26 Tube connection allowing differential movement

Country Status (1)

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5934711A (en) * 1997-08-06 1999-08-10 Perfection Corporation Mold shot riser element with O-ring sealing
WO2000050800A1 (en) * 1999-02-23 2000-08-31 Legris Sa Connection device for connecting a pipe end to an element

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5934711A (en) * 1997-08-06 1999-08-10 Perfection Corporation Mold shot riser element with O-ring sealing
WO2000050800A1 (en) * 1999-02-23 2000-08-31 Legris Sa Connection device for connecting a pipe end to an element

Also Published As

Publication number Publication date
GB0314880D0 (en) 2003-07-30

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