WO2006115417A1 - A ring fastener device - Google Patents

A ring fastener device Download PDF

Info

Publication number
WO2006115417A1
WO2006115417A1 PCT/NO2006/000158 NO2006000158W WO2006115417A1 WO 2006115417 A1 WO2006115417 A1 WO 2006115417A1 NO 2006000158 W NO2006000158 W NO 2006000158W WO 2006115417 A1 WO2006115417 A1 WO 2006115417A1
Authority
WO
WIPO (PCT)
Prior art keywords
ring fastener
cylindrical body
recess
fastener
protrusion
Prior art date
Application number
PCT/NO2006/000158
Other languages
French (fr)
Inventor
Rune Freyer
Original Assignee
Easy Well Solutions As
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Easy Well Solutions As filed Critical Easy Well Solutions As
Publication of WO2006115417A1 publication Critical patent/WO2006115417A1/en

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
    • 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

Definitions

  • This invention relates to a ring fastener. More particularly it relates to a ring fastener which, encircling a cylindrical body, is movable along the body until it is shrunk to engage a recess in the cylindrical body.
  • the bodies may be fixedly connected by means of welding, for example.
  • welding When high-grade materials in heavily strained structures are involved, the welding operation must be carried out in accordance with relatively complicated procedures with appropriate control procedures. In some cases the material of one or both bodies is not weldable.
  • Another known method is to secure the ring fastener to the cylindrical body by means of setscrews or similar.
  • the setscrews are placed in threaded bores in the ring fastener and screwed radially into the cylindrical body. It has turned out to be difficult to obtain sufficiently high and accurate shear force values by means of this securing method.
  • the ring fastener may also be shrunk onto the cylindrical body by means of heating and cooling. Because of, for example, the dimensional tolerance of a pipe, it turns out to be difficult to achieve sufficiently repeatable tightening between the bodies by means of shrinking.
  • the invention has as its object to remedy or reduce at least one of the drawbacks of the prior art.
  • a ring fastener encircling a cylindrical body is movable along the cylindrical body.
  • the cylindrical body is provided with at least one recess and the ring fastener is provided with at least one corresponding protrusion.
  • the protrusion In its active shrunk position the protrusion is at least partially within the recess, thereby locking the ring fastener against movement along the cylindrical body.
  • the recess it is advantageous for the recess to encircle the cylindrical body in order to facilitate the positioning of the ring fastener, as in this embodiment the protrusion will meet the recess regardless of its rotational position relative to the cylindrical body.
  • the protrusion encircles the cylindrical body to obtain the greatest possible strength in the fastening.
  • the ring fastener may form part of a hollow body extending across a length of the cylindrical body, and the hollow body may be provided with several ring fasteners, for example to connect several cylindrical bodies.
  • Figure 1 shows a ring fastener which is being moved on a pipe
  • Figure 2 shows the ring fastener brought into position before shrinking
  • Figure 3 shows the ring fastener after it has been shrunk radially onto the pipe.
  • the reference numeral 1 identifies a sleeve fastener forming part of a hollow body 2 and in its machined state being encirclingly movable across a cylindrical body 4, here in the form of a pipe.
  • the pipe 4 is provided with a number of encircling recesses 6, for exampling in the form of threads.
  • the sleeve fastener 1 is internally provided with a number of encircling protrusions 8 complementarity fitting into the recesses 6.
  • the number of recess 6 in the pipe 4 may be considerably larger than the number of protrusions 8 in the sleeve fastener 1. such a configuration will enable the sleeve fastener 1 to be secured in one of several positions along the pipe 4.
  • the sleeve fastener 1 When the sleeve fastener 1 has been placed in a desired position along the pipe 4, the sleeve fastener 1 is shrunk by means of radial forces, for example by means of hydraulics, until the protrusions 8 engage the recesses 6. Because of the radial plastic deformation of the sleeve fastener 1, the protrusions 8 will stay, at least partially, within the recesses 6 even after the radial forces have been removed.

Abstract

A ring fastener device (1), in which the ring fastener (1) encircles a cylindrical body (4), and the cylindrical body (4) is provided with at least one recess (6) and the ring fastener (1) is provided with at least one protrusion (8) corresponding to the recess (6), the ring fastener (1) being arranged to be shrunk radially, so that the protrusion (8) engages the recess (6).

Description

A RING FASTENER DEVICE
This invention relates to a ring fastener. More particularly it relates to a ring fastener which, encircling a cylindrical body, is movable along the body until it is shrunk to engage a recess in the cylindrical body.
During installation work it is necessary, relatively often, to be able to move a ring fastener encircling a pipe or an axle, for example, along the pipe or the axle, and then be able to connect the ring fastener to this cylindrical body with sufficient strength so that axial movement between the two bodies is prevented.
According to the prior art, the bodies may be fixedly connected by means of welding, for example. When high-grade materials in heavily strained structures are involved, the welding operation must be carried out in accordance with relatively complicated procedures with appropriate control procedures. In some cases the material of one or both bodies is not weldable.
Another known method is to secure the ring fastener to the cylindrical body by means of setscrews or similar. Typically, the setscrews are placed in threaded bores in the ring fastener and screwed radially into the cylindrical body. It has turned out to be difficult to obtain sufficiently high and accurate shear force values by means of this securing method.
The ring fastener may also be shrunk onto the cylindrical body by means of heating and cooling. Because of, for example, the dimensional tolerance of a pipe, it turns out to be difficult to achieve sufficiently repeatable tightening between the bodies by means of shrinking.
The invention has as its object to remedy or reduce at least one of the drawbacks of the prior art.
The object is realized in accordance with the invention through the features specified in the description below and in the following Claims.
A ring fastener encircling a cylindrical body is movable along the cylindrical body. The cylindrical body is provided with at least one recess and the ring fastener is provided with at least one corresponding protrusion. When the ring fastener is positioned in such a way that the protrusion is located above the recess, the ring fastener is deformably shrunk radially until the protrusion engages the recess.
In its active shrunk position the protrusion is at least partially within the recess, thereby locking the ring fastener against movement along the cylindrical body.
It is advantageous for the recess to encircle the cylindrical body in order to facilitate the positioning of the ring fastener, as in this embodiment the protrusion will meet the recess regardless of its rotational position relative to the cylindrical body.
With advantage, the protrusion encircles the cylindrical body to obtain the greatest possible strength in the fastening.
The ring fastener may form part of a hollow body extending across a length of the cylindrical body, and the hollow body may be provided with several ring fasteners, for example to connect several cylindrical bodies.
In what follows there is described a non-limiting example of a preferred embodiment which is visualized in the accompanying drawings, in which:
Figure 1 shows a ring fastener which is being moved on a pipe;
Figure 2 shows the ring fastener brought into position before shrinking; and
Figure 3 shows the ring fastener after it has been shrunk radially onto the pipe.
In the drawings the reference numeral 1 identifies a sleeve fastener forming part of a hollow body 2 and in its machined state being encirclingly movable across a cylindrical body 4, here in the form of a pipe.
Externally, the pipe 4 is provided with a number of encircling recesses 6, for exampling in the form of threads.
The sleeve fastener 1 is internally provided with a number of encircling protrusions 8 complementarity fitting into the recesses 6. The number of recess 6 in the pipe 4 may be considerably larger than the number of protrusions 8 in the sleeve fastener 1. such a configuration will enable the sleeve fastener 1 to be secured in one of several positions along the pipe 4.
When the sleeve fastener 1 has been placed in a desired position along the pipe 4, the sleeve fastener 1 is shrunk by means of radial forces, for example by means of hydraulics, until the protrusions 8 engage the recesses 6. Because of the radial plastic deformation of the sleeve fastener 1, the protrusions 8 will stay, at least partially, within the recesses 6 even after the radial forces have been removed.

Claims

1. A ring fastener device (1), in which the ring fastener (1) encircles a cylindrical body (4), c h a r a c t e r i z e d i n that the cylindrical body (4) is provided with at least one recess (6) and the ring fastener (1) is provided with at least one protrusion (8) corresponding to the recess (6), the ring fastener (1) being arranged to be shrunk radially, so that the protrusion (8) engages the recess (6).
2. A device in accordance with claim 1, c h a r a c t e r i z e d i n that the protrusion (8) is located, at least partially, within the recess (6) when the sleeve (1) is in its active shrunk state.
3. A device in accordance with claim 1, c h a r a c t e r i z e d i n that the recess (6) encircles the cylindrical body (4).
4. A device in accordance with claim 1, c h a r a c t e r i z e d i n that the protrusion (8) encircles the cylindrical body (4).
5. A device in accordance with claim 1, c h a r a c t e r i z e d i n that the ring fastener (1) forms part of a hollow body (2).
PCT/NO2006/000158 2005-04-28 2006-04-27 A ring fastener device WO2006115417A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NO20052078A NO325914B1 (en) 2005-04-28 2005-04-28 Device for attachment
NO20052078 2005-04-28

Publications (1)

Publication Number Publication Date
WO2006115417A1 true WO2006115417A1 (en) 2006-11-02

Family

ID=35276294

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NO2006/000158 WO2006115417A1 (en) 2005-04-28 2006-04-27 A ring fastener device

Country Status (2)

Country Link
NO (1) NO325914B1 (en)
WO (1) WO2006115417A1 (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2112324A1 (en) 2008-04-22 2009-10-28 Swelltec Limited Ring member for swellable apparatus, assembly and method
WO2015014557A1 (en) * 2013-07-31 2015-02-05 Viega Gmbh & Co. Kg Press fitting for a threaded connection and method for attaching a fitting to a threaded connection

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1978000004A1 (en) * 1977-06-02 1978-12-07 Advanced Chem Equip Ltd Pipes and couplings and method of coupling pipes
GB1542847A (en) * 1976-04-26 1979-03-28 Curran T Pipe couplings
DE29907405U1 (en) * 1999-04-29 1999-07-22 Kermi Gmbh Connection element for metal pipelines

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1542847A (en) * 1976-04-26 1979-03-28 Curran T Pipe couplings
WO1978000004A1 (en) * 1977-06-02 1978-12-07 Advanced Chem Equip Ltd Pipes and couplings and method of coupling pipes
DE29907405U1 (en) * 1999-04-29 1999-07-22 Kermi Gmbh Connection element for metal pipelines

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2112324A1 (en) 2008-04-22 2009-10-28 Swelltec Limited Ring member for swellable apparatus, assembly and method
EP2508706A1 (en) 2008-04-22 2012-10-10 Swelltec Limited Ring member for swellable apparatus, assembly and method
WO2015014557A1 (en) * 2013-07-31 2015-02-05 Viega Gmbh & Co. Kg Press fitting for a threaded connection and method for attaching a fitting to a threaded connection
US10359132B2 (en) 2013-07-31 2019-07-23 Viega Technology Gmbh & Co. Kg Press fitting for a threaded connection and method for attaching a fitting to a threaded connection

Also Published As

Publication number Publication date
NO20052078L (en) 2006-10-30
NO325914B1 (en) 2008-08-18
NO20052078D0 (en) 2005-04-28

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