NL2010057C2 - A coupling device for coupling with a tube. - Google Patents

A coupling device for coupling with a tube. Download PDF

Info

Publication number
NL2010057C2
NL2010057C2 NL2010057A NL2010057A NL2010057C2 NL 2010057 C2 NL2010057 C2 NL 2010057C2 NL 2010057 A NL2010057 A NL 2010057A NL 2010057 A NL2010057 A NL 2010057A NL 2010057 C2 NL2010057 C2 NL 2010057C2
Authority
NL
Netherlands
Prior art keywords
tube
pressure elements
coupling device
sealing ring
support surface
Prior art date
Application number
NL2010057A
Other languages
Dutch (nl)
Inventor
Jurrien Velde
Original Assignee
Fischer Georg Waga Nv
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 Fischer Georg Waga Nv filed Critical Fischer Georg Waga Nv
Priority to NL2010057A priority Critical patent/NL2010057C2/en
Priority to EP13802580.4A priority patent/EP2935963A1/en
Priority to PCT/EP2013/075611 priority patent/WO2014102045A1/en
Application granted granted Critical
Publication of NL2010057C2 publication Critical patent/NL2010057C2/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
    • F16L21/00—Joints with sleeve or socket
    • F16L21/02—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings
    • F16L21/04—Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings in which sealing rings are compressed by axially-movable members
    • 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
    • F16L21/00—Joints with sleeve or socket
    • F16L21/08—Joints with sleeve or socket with additional locking means

Abstract

A coupling device (1) for coupling with a tube (10), comprising a sleeve part (2) with an insert end for the tube and pressure elements (4) for exerting a clamping force on the tube, wherein the said pressure elements have radially converging surfaces (5, 6) that radially converge towards each other in a direction away from the longitudinal axis of the device, and wherein the sleeve part has tapering support surfaces (7, 8) that cooperate which said radially converging surfaces of the pressure elements for pressing the pressure elements towards the tube, and wherein a sealing ring (9) is applied to provide a seal around the tube, of which sealing ring at least a first portion (9') is placed between the tube and the pressure elements and at least a second portion (9") is placed between the pressure elements (4) and at least one selected tapering support surface (8) of the said tapering support surfaces of the sleeve part, which surface (8) is provided with irregularities (12) so as to counter movement of the second portion of the sealing ring relative to this selected tapering support surface.

Description

A coupling device for coupling with a tube
The invention relates to a coupling device for coupling with a tube, comprising a sleeve part with an insert end 5 for the tube and pressure elements for exerting a clamping force on the tube, wherein the said pressure elements have radially converging surfaces that radially converge towards each other in a direction away from the longitudinal axis of the device, and wherein the sleeve part has tapering support sur-10 faces that cooperate which said radially converging surfaces of the pressure elements for pressing the pressure elements towards the tube, and wherein a sealing ring is applied to provide a seal around the tube, of which sealing ring at least a first portion is placed between the tube and the pressure 15 elements and at least a second portion is placed between the pressure elements and at least one selected tapering support surface of the said tapering support surfaces of the sleeve part.
Such a coupling device is known from EP-A-0 794 378 20 in the name of the applicant. The pressure elements as applied in this known coupling device are embodied as substantially wedge-shaped elements in order to provide the radially converging surfaces that radially converge towards each other in a direction away from the longitudinal axis of the device. The 25 said pressure elements slidably abut to each other to form a substantially closed ring around the tube in order to effectively press the sealing ring against the tube. The construction with these slidably abutting pressure elements enables the coupling device to accommodate and automatically adjust to 30 different tube diameters without modification of the coupling device and its constituting elements.
A problem with the known coupling device is that it is sensitive to the dimensions of the sealing ring, usually a rubber ring. When the sealing ring is too thick its defor-35 mation may become problematic when applying the coupling de vice to smaller diameter tubes. Eventually this may result in leakage due to the large deformations of the thick sealing ring that are required when applying the coupling device on 2 smaller diameter tubes. The large deformations may lead to rupture of the sealing ring. When on the other hand the sealing ring is too thin the effectivity of the sealing may become less than optimal when the tube has an irregular outer sur-5 face. In relative terms the required deformation of a thin sealing ring to avoid leakage is then larger than in case the sealing ring can be designed with a thicker dimension.
Still another problem is that particularly with relatively thick sealing rings the pressure of the medium in the 10 tube may cause the sealing ring to be pressed out from between the pressure elements and the cooperating tapering support surfaces for these pressure elements.
Consequently in the prior art the selection of the thickness of the sealing ring is a delicate compromise aimed 15 at avoiding the above noted problems. As one of the measures that is used in the prior art to alleviate these problems it is known to provide the sealing ring with superficial irregularities at least on the surface that abuts to one of the tapering support surfaces for the pressure elements. A problem 20 with this solution is however that the thinner parts of the sealing ring are then subjected to excessive strain which eventually may also result in rupture of the sealing ring and leakage problems .
It is an object of the invention to provide an alter-25 native solution to the above problems.
It is a further object of the invention to make the sealing ring less sensitive to relative movement caused by the pressures of the medium in the tube that connects to the coupling device.
30 It is still a further object of the invention to ena ble the selection of a wider range of thickness dimensions of the sealing ring of the coupling device.
These and other objectives of the invention that may become clear from the following disclosure are provided by a 35 coupling device having the features of one or more of the appended claims.
According to a first aspect of the invention the selected tapering support surface of the tapering support surfaces of the sleeve part is provided with irregularities so as 3 to counter movement of the second portion of the sealing ring relative to this selected tapering support surface. Surprisingly this solution brings about a huge amount of flexibility in the selection of the thickness of the sealing ring and its 5 application with a large variety of dimensions of the tube without compromising its prime function to avoid leakage. Many forms of irregularities can be applied and their selection should be based on a proper evaluation of the reguirements in a particular situation.
10 A generally applicable form of the said irregulari ties on the selected tapering support surface is to provide them as protruding ridges extending from this selected tapering support surface.
Advantageously the said irregularities on the select-15 ed tapering support surface are provided as concentric ridges relative to the longitudinal axis of the device. Such concentric ridges are easy to manufacture. This ease of manufacturing is particularly promoted when the concentric ridges are uninterrupted. From the perspective of effective sealing it 20 may however also be beneficial that the concentric ridges are interrupted.
Another suitable form of the irregularities is if they exhibit the shape of a Belgian waffle. This Belgian waffle shape is also easy to manufacture and may be particularly 25 effective with a sealing ring of relatively soft rubber.
In most cases it suffices that the irregularities are shaped symmetrically, yet they can also be selected with an asymmetrical shape depending on the circumstances of the case.
With reference to the appended drawing of some typi-30 cal exemplary embodiments of the coupling device of the invention, the invention is further elucidated.
In the drawing: -figure 1 generally depicts the construction of the coupling device of the invention; 35 -figure 2 and figure 3 show a sectional view of one of the slanted or tapered support surfaces construed in accordance with the invention; and -each of figures 4-7 provides a frontal view of respective exemplary embodiments of the slanted or tapered sup- 4 port surfaces construed in accordance with the invention.
Whenever in the figures the same reference numerals are applied, these numerals refer to the same parts.
Turning first to figure 1 the coupling device 1 of 5 the invention is shown in a longitudinal sectional view. This coupling device 1 for tube 10 comprises a sleeve part 2 with an insert end 3 for the tube 10 and pressure elements 4 for exerting a clamping force on the tube 10.
The pressure elements 4 have radially converging sur-10 faces 5, 6 that radially converge towards each other in a direction away from the longitudinal axis 11 of the device. The sleeve part 2 on the other hand has tapering support surfaces 7, 8 that cooperate which said radially converging surfaces 5, 6 of the pressure elements 4 for pressing the pressure ele-15 ments 4 towards the tube 10. A sealing ring 9 is applied to provide a seal around the tube 10, of which sealing ring 9 at least a first portion 9' is placed between the tube 10 and the pressure elements 4 and at least a second portion 9'' is placed between the pressure elements 4 and at least one se-20 lected tapering support surface 8 of the said tapering support surfaces 7, 8 of the sleeve part 1.
Turning now also to figures 2 and 3, the said selected tapering or slanted support surface 8 of the sleeve part 1 is provided with irregularities 12 so as to counter movement 25 of the second portion 9'' of the sealing ring 9 relative to this selected tapering support surface 8.
The figures 4-7 shows several possibilities of implementing the irregularities 12, each case showing that the irregularities 12 on the slanted or tapering support surface 8 30 are provided as protruding ridges extending from the selected tapering support surface 8.
Figures 4 and 7 provide a frontal view showing that the said irregularities 12 on the selected tapering support surface 8 are provided as concentric ridges relative to the 35 longitudinal axis 11 of the device. In figure 4 the concentric ridges 12 are uninterrupted. In figure 5 the concentric ridges 12 are interrupted.
Figure 6 shows the option that the irregularities 12 exhibit the shape of a Belgian waffle. Figure 5 still shows 5 another possible embodiment. The examples shown in the figures 4-7 all relate to irregularities that are shaped symmetrically. It is however also feasible to shape the irregularities asymmetrically .
5 The above given explanation with reference to the coupling device according to the invention is to be understood as non-limiting with regard to the protective scope due the invention as specified in the appended claims.

Claims (7)

1. Koppelinrichting (1) voor koppeling met een buis (10) , omvattende een hulsdeel (2) met een invoeruiteinde (3) voor de buis (10) en drukelementen (4) voor het uitoefenen van een klemkracht op de buis (10), waarin de genoemde drukelemen- 5 ten (4) radiaal convergerende oppervlakken (5, 6) bezitten die radiaal naar elkaar toe convergeren in een richting die afgericht is van de longitudinale as (11) van de inrichting, en waarbij het hulsdeel (2) taps verlopende steunoppervlakken (7, 8) bezit die samenwerken met genoemde radiaal convergerende 10 oppervlakken (5, 6) van de drukelementen (4) voor het in de richting van de buis (10) drukken van de drukelementen (4), en waarbij een afdichtring (9) wordt toegepast voor het verschaffen van een afdichting rond de buis (10), van welke afdichtring (9) tenminste een eerste deel (9') geplaatst is tussen de 15 buis (10) en de drukelementen (4) en tenminste een tweede deel (9'r) geplaatst is tussen de drukelementen (4) en tenminste één geselecteerd taps verlopend steunoppervlak (8) van de genoemde taps verlopende steunoppervlakken (7, 8) van het hulsdeel (1), met het kenmerk, dat het genoemde geselecteerde taps 20 verlopende steunoppervlak (8) van de taps verlopende steunoppervlakken (7, 8) van het hulsdeel (1) voorzien is van onregelmatigheden (12) om beweging van het tweede deel (9'r) van de afdichtring (9) ten opzichte van dit geselecteerde taps verlopende steunoppervlak (8) tegen te gaan.Coupling device (1) for coupling with a tube (10), comprising a sleeve part (2) with an input end (3) for the tube (10) and pressure elements (4) for exerting a clamping force on the tube (10) wherein said pressure elements (4) have radially converging surfaces (5, 6) converging radially toward each other in a direction away from the longitudinal axis (11) of the device, and wherein the sleeve member (2) has tapered support surfaces (7, 8) cooperating with said radially converging surfaces (5, 6) of the pressure elements (4) for pressing the pressure elements (4) in the direction of the tube (10), and wherein sealing ring (9) is used to provide a seal around the tube (10), of which sealing ring (9) at least a first part (9 ') is placed between the tube (10) and the pressure elements (4) and at least a second part (9 ') is placed between the pressure elements (4) and at least one selected d tapered support surface (8) of said tapered support surfaces (7, 8) of the sleeve member (1), characterized in that said selected tapered support surface (8) of the tapered support surfaces (7, 8) of the sleeve part (1) is provided with irregularities (12) to prevent movement of the second part (9'r) of the sealing ring (9) relative to this selected tapered support surface (8). 2. Koppelinrichting (1) volgens conclusie 1, met het kenmerk, dat de genoemde onregelmatigheden (12) op het geselecteerde taps verlopende steunoppervlak (8) voorzien zijn als uitstekende randen die reiken vanaf het geselecteerde taps verlopende steunoppervlak (8).Coupling device (1) according to claim 1, characterized in that said irregularities (12) are provided on the selected tapered support surface (8) as projecting edges extending from the selected tapered support surface (8). 3. Koppelinrichting (1) volgens conclusie 1 of 2, met het kenmerk, dat de genoemde onregelmatigheden (12) op het geselecteerde taps verlopende steunoppervlak (8) voorzien zijn als concentrische richels ten opzichte van de longitudinale as (11) van de inrichting.Coupling device (1) according to claim 1 or 2, characterized in that said irregularities (12) are provided on the selected tapered support surface (8) as concentric ridges with respect to the longitudinal axis (11) of the device. 4. Koppelinrichting volgens conclusie 3, met het ken merk, dat de concentrische richels ononderbroken zijn.Coupling device according to claim 3, characterized in that the concentric ridges are continuous. 5 Belgische wafel.5 Belgian waffles. 5. Koppelinrichting volgens conclusie 3, met het kenmerk, dat de concentrische richels onderbroken zijn.Coupling device according to claim 3, characterized in that the concentric ridges are interrupted. 6. Koppelinrichting volgens conclusie 1 of 2, met het kenmerk, dat de onregelmatigheden (12) de vorm hebben van eenCoupling device according to claim 1 or 2, characterized in that the irregularities (12) are in the form of a 7. Koppelinrichting volgens één der voorgaande conclusies, met het kenmerk, dat de onregelmatigheden symmetrisch gevormd zijn.7. Coupling device as claimed in any of the foregoing claims, characterized in that the irregularities are formed symmetrically.
NL2010057A 2012-12-24 2012-12-24 A coupling device for coupling with a tube. NL2010057C2 (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NL2010057A NL2010057C2 (en) 2012-12-24 2012-12-24 A coupling device for coupling with a tube.
EP13802580.4A EP2935963A1 (en) 2012-12-24 2013-12-05 A coupling device for coupling with a tube
PCT/EP2013/075611 WO2014102045A1 (en) 2012-12-24 2013-12-05 A coupling device for coupling with a tube

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
NL2010057 2012-12-24
NL2010057A NL2010057C2 (en) 2012-12-24 2012-12-24 A coupling device for coupling with a tube.

Publications (1)

Publication Number Publication Date
NL2010057C2 true NL2010057C2 (en) 2014-06-25

Family

ID=47748732

Family Applications (1)

Application Number Title Priority Date Filing Date
NL2010057A NL2010057C2 (en) 2012-12-24 2012-12-24 A coupling device for coupling with a tube.

Country Status (3)

Country Link
EP (1) EP2935963A1 (en)
NL (1) NL2010057C2 (en)
WO (1) WO2014102045A1 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102014114959A1 (en) * 2014-10-15 2016-04-21 Vag-Armaturen Gmbh Pipe connecting device
NL1041958B1 (en) 2016-06-29 2018-01-05 Wavin Bv Press fitting device

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH408565A (en) * 1963-12-11 1966-02-28 Von Roll Ag Socket pipe connection
GB2363437A (en) * 2000-06-13 2001-12-19 Glynwed Pipe Systems Ltd Pipe coupling device
GB2460912A (en) * 2008-06-19 2009-12-23 Crane Ltd An annular gasket
GB2474899A (en) * 2009-10-30 2011-05-04 Crane Ltd T A Viking Johnson Improved pipe coupling

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NL1002514C2 (en) 1996-03-04 1997-09-05 Fischer Georg Waga Nv Coupling device.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH408565A (en) * 1963-12-11 1966-02-28 Von Roll Ag Socket pipe connection
GB2363437A (en) * 2000-06-13 2001-12-19 Glynwed Pipe Systems Ltd Pipe coupling device
GB2460912A (en) * 2008-06-19 2009-12-23 Crane Ltd An annular gasket
GB2474899A (en) * 2009-10-30 2011-05-04 Crane Ltd T A Viking Johnson Improved pipe coupling

Also Published As

Publication number Publication date
EP2935963A1 (en) 2015-10-28
WO2014102045A1 (en) 2014-07-03

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Effective date: 20170101