WO2010047573A1 - Raccord de tuyau - Google Patents

Raccord de tuyau Download PDF

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Publication number
WO2010047573A1
WO2010047573A1 PCT/MY2009/000110 MY2009000110W WO2010047573A1 WO 2010047573 A1 WO2010047573 A1 WO 2010047573A1 MY 2009000110 W MY2009000110 W MY 2009000110W WO 2010047573 A1 WO2010047573 A1 WO 2010047573A1
Authority
WO
WIPO (PCT)
Prior art keywords
clinching
pipe coupling
coupling according
pipe
sleeve
Prior art date
Application number
PCT/MY2009/000110
Other languages
English (en)
Inventor
Marshita Binti Abdul Malik
Original Assignee
Kindraco Hardware Sendirian Berhad
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 Kindraco Hardware Sendirian Berhad filed Critical Kindraco Hardware Sendirian Berhad
Priority to NZ592253A priority Critical patent/NZ592253A/xx
Priority to CN200980142195.0A priority patent/CN102203490B/zh
Priority to AU2009307148A priority patent/AU2009307148B2/en
Publication of WO2010047573A1 publication Critical patent/WO2010047573A1/fr

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
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/08—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe
    • F16L19/083—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe the longitudinal cross-section of the ring not being modified during clamping
    • F16L19/086—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts with metal rings which bite into the wall of the pipe the longitudinal cross-section of the ring not being modified during clamping with additional sealing means
    • 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
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/06—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends
    • F16L19/065—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends the wedging action being effected by means of a ring
    • 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
    • F16L19/00—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts
    • F16L19/06—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends
    • F16L19/075—Joints in which sealing surfaces are pressed together by means of a member, e.g. a swivel nut, screwed on or into one of the joint parts in which radial clamping is obtained by wedging action on non-deformed pipe ends specially adapted for spigot-and-socket joints for pipes of the same diameter
    • 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
    • F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
    • F16L47/04—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with a swivel nut or collar engaging the pipe

Definitions

  • This invention concerns a coupling assembly for a pipe end-to-end joint which generally comprises of a tubular body for conducting fluid between one pipe end to the other end, a clinching sleeve, gasket ring and coupling nut for fluid- proofing at each end of the body. Improved features on fluid-proofing and pre- assembling of the coupling are disclosed.
  • a body which may also be referred to as “tubular body” hereinafter
  • Other components such as gasket ring, a clinching sleeve and/or coupling nut are provided essentially for fluid-proofing the joints.
  • a tubular body is provided with ends that are adapted to be inserted into the pipe ends.
  • Barbs (6) and/or annular ribs (10, 14) are provided for grip and fluid-proofing respectively while a coupling nut (2) is provided to fasten the pipe end onto the body's end that has been inserted into the polymeric pipe end for engaging its inner surface.
  • the sleeve has been variously called as “compression sleeve”, “clinching sleeve”, “gripping sleeve” and the like and which we refer to hereinafter as “clinching sleeve” for ease of reference in this specification.
  • Further developments made to the sleeve leads to the development of a ring portion for abutting the gasket ring and a clinching portion for gripping on the outer surface of the polymeric pipe end.
  • Such development may be seen in PCT Published Patent Application No. WO 02/504669 (Philmac) wherein the gasket ring abutting portion and the gripping portion are provided as two separate components.
  • a pipe coupling comprising a body having a tubular conduit for enabling fluid flow therethrough from a first opening to at least a second opening wherein at least one of said openings is provided with an inner tubular portion into which a pipe end may be inserted, ' an outer tubular portion having a diameter larger than the inner tubular portion wherein an annular surface transiting between said inner and outer tubular portions is provided; and external threading, ' a gasket ring having a diameter suitable to fit around said pipe end and be seated at said annular surface!
  • a clinching sleeve comprising a ring portion at one end having a diameter disposable within the outer tubular portion of the body and providing an abutment surface against said gasket ring upon being seated," and a plurality of clinching flaps extending from the other end wherein each of said clinching flaps' inner surface is provided with gripping means and distributed to encircle a pipe end, " and a coupling nut having an inner opening at one end provided with internal threading complementary to said body's external threading, and an outer opening at the other end sufficient for the pipe end to be inserted therethrough.
  • At least a protrusion is provided on the inner surface of the outer tubular portion of the body and at least a protuberance is provided on the outer surface of the clinching sleeve ring portion whereby in mutual cooperation, said clinching sleeve's turning within said body to less than a turn.
  • a plurality of protrusions and/or a plurality of protuberances is provided.
  • 3 protrusions are provided mutually equidistant along said inner surface of said body.
  • Three protuberances are preferably provided mutually equidistant along said outer surface of said clinching sleeve ring portion.
  • the 3 protrusions may preferably be further provided mutually equidistant along said outer surface of said clinching sleeve ring portion, thereby mutually cooperate to limit the clinching sleeve to one-third turning.
  • At least a protrusion is provided on the inner surface of the outer tubular portion of the body and at least a keyway is provided on the outer surface of the clinching sleeve ring portion whereby the protrusion is insertable into said keyway and limiting the clinching sleeve's turning within said body to within keyway width.
  • a plurality of keyways is provided corresponding to a plurality of protrusion.
  • Six keyways are preferably provided mutually equidistant along said outer surface of the clinching sleeve ring portion and three protrusions are provided on the body in complementary positions to be inserted into corresponding keyways.
  • the protrusions are provided sufficiently narrow to allow limited sliding within a keyway such that turning of clinching sleeve within in the body is limited accordingly.
  • the gripping means provided on the inner surface of the clinching flaps comprises barb edges which tips define a circumference in which a pipe end may be inserted thereinto without said barb edges cutting into said pipe end surface.
  • the clinching flaps are preferably flexed inwardly due to pressure imparted by the coupling nut's inner surfaces upon tightening of said coupling nut such that the barb edges securely grip upon the pipe end surface.
  • the clinching sleeve may be symmetrically provided with three clinching flaps which inner surfaces having barbs with blunt edges.
  • each of the clinching flap corners are rounded and are separated from each other by a U-shape cut out.
  • the clinching sleeve ring portion's abutment surface has its circumferential edges rounded.
  • the abutment surface comprises a raised, rounded circumferential Up which may comprise a circumferential concave surface contoured to cover about an inner [lower] segment of the gasket ring's surface.
  • the circumferential concave surface is contoured to cover about an inner or lower quadrant of the gasket ring's cross-sectional surface.
  • the clinching sleeve ring portion's inner opening comprises a tapering.
  • the coupling nut's external surface are provided with longitudinal ribs extending from the inner opening end over at least a neck portion at the outer opening.
  • the outer opening end edge is provided with inwardly extending peripheral flange thereby retaining clinching flap ends within said outer opening end as the coupling nut is rotated to tighten, and wherein the remaining diameter of the outer opening is sufficient for a pipe end to be inserted therethrough.
  • the peripheral flange is preferably continuous around the outer opening end edge, forming a lip around said outer opening.
  • At least a bump is provided in the root or between adjacent crests of the threading of the body external threading.
  • At least a depression complementary to the bump is preferably provided along a crest of the coupling nut's internal threading.
  • a plurality of depressions is provided along the coupling nut's internal threading.
  • the bumps are provided at about the penultimate tightening part of the threading.
  • Another set of bumps may be similarly provided on the threading on the opposite side of the body's circumference.
  • the bumps are provided to engage just before the ending of complementary threading of the coupling nut or body. The engagement may cause deformation of the complementary threading upon tightening.
  • the body's inner tubular portion is provided with a plurality of ribs longitudinally extending substantially along and symmetrically distributed around said inner tubular portion.
  • the plurality of ribs is preferably profiled to provide even tight fit around a pipe end insertable thereinto.
  • Each of the aforesaid components i.e. clinching sleeve, tubular body and coupling nut may be used independently as components in conventional compatible pipe coupling assemblies. Similarly, many of the features of the respective components may be provided independently and the respective component used in conventional compatible pipe coupling assemblies. Our aforesaid components may also be provided as a preassembled coupling.
  • FIGURE 1 shows an assembled pipe coupling installed on a pipe end joint according to our invention in elevation view * '
  • FIGURE 2 illustrates the pipe coupling of FIG. 1 in cross-sectional view
  • FIGURE 3 depicts a pre-assembled pipe coupling of our invention independent of the pipe joint in elevation view
  • FIGURE 4 exemplifies the pre-assembled pipe coupling of FIG. 3 in cross- sectional view
  • FIGURE 5 represents a tubular body according to our invention in elevation view
  • FIGURE 6 illustrates the tubular body of FIG. 5 in cross-sectional view
  • FIGURE 7 shows a number of tubular body embodiments in which the features of our invention may be employed
  • FIGURE 8 depicts 2 embodiments of the clinching sleeve according to our invention in perspective views!
  • FIGURE 9A exemplifies one of the clinching sleeve of FIG. 7 in side elevation view
  • FIGURE 9B and FIGURE 9C shows an alternative embodiment of the clinching sleeve's limited turning with keyway feature
  • FIGURE 1OA, FIGURE 1OB, FIGURE 1OC, FIGURE 10D, FIGURE 1OE and FIGURE 1OF which represent detailed cross-sectional view of the clinching sleeve;
  • FIGURE 11 shows a coupling nut according to our invention in side elevation view,'
  • FIGURE 12 comprising FIGURE 12A illustrates the coupling nut of FIG. 11 in cross-sectional view, with FIGURE 12B and FIGURE 12C showing schematic views of various features of the coupling nut,"
  • FIGURE 13 depicts the pipe coupling according to our invention comprising the aforementioned tubular body, clinching sleeve and coupling nut being preassembled with a gasket ring inserted; and FIGURE 14 exemplifies the pipe coupling of FIG. 13 wherein the coupling nut is tightened with the clinching sleeve in full grip upon the pipe.
  • FIGURE 1 which shows an external elevation view
  • FIGURE 2 which shows a cross-sectional view
  • our proposed pipe coupling assembly is comprised of a tubular body (20), a gasket ring (40) (hidden in FIG. l), clinching sleeve (60), and a coupling nut (80) forming an end-to-end joint between two pipe ends (10, 12).
  • FIGURE 3 and FIGURE 4 show the same pipe coupling assembly without the pipe ends inserted thereinto.
  • FIGURE 6 is the body (20) which comprises a tubular conduit (22) which enables fluid to flow therethrough from a first opening (24) to at least a second opening (26), and vice versa.
  • the body may be provided as various types of joints such as that shown in FIGURES 7A - 7 J with
  • FIGURE 7A showing a male threaded straight joint or adaptor!
  • FIGURE 7B showing a reducing straight joint or adaptor
  • FIGURE 7C showing a female threaded straight joint or adaptor
  • FIGURE 7D showing a reducing T-joint
  • FIGURE 7E showing a male T-joint
  • FIGURE 7F showing a female T joint
  • FIGURE 7G showing an equal T-joint
  • FIGURE 7H showing an equal elbow or L-joint
  • FIGURE 71 showing a female elbow, ' and
  • FIGURE 7 J showing a male elbow.
  • Our invention may even be practised on an outlet or inlet tubes of a container wherein only one side of the tube or "body” is threaded for coupling with a clinching sleeve (60), a gasket ring (40) and a coupling nut (80).
  • a tubular body (20) would typically have at least a pair of each of the clinching sleeves (60), gasket rings (40) and coupling nuts (80).
  • the opening is provided with an inner tubular portion (28) into which a pipe end (10) may be inserted.
  • This inner tubular portion (28) extends to an outer tubular portion (30) having a diameter larger than the inner tubular portion (28).
  • the transition between the inner (28) and outer (30) tubular portions may be provided as an annular surface (32) for seating a gasket ring (40).
  • the gasket ring (40) typically has a diameter to provide a snug fit around a pipe end and the annular surface (32) diameter and profile may thus be provided accordingly.
  • the external surface of the outer tubular portion (30) may be provided with external threading (34) complementary with the inner threading of a coupling nut (80). As shown in the drawings, the threading (34) may extend over to the external surface of inner tubular portion (28) if necessary so as to enable the coupling nut (to be explained later) to provide the desired fastening.
  • the middle portion may be provided with specific patterns of ribs (36) or spokes to enable the body to be gripped by a spanner or a custom wrench, or simply by hand.
  • the body may be provided with a plurality of ribs (27) longitudinally extending along and symmetrically distributed around said inner tubular portion such that a pipe end may be inserted snugly into the inner tubular portion (28) of the body (20) and in an axially centralized manner so that any torsional stress exerted on the pipe line outside of the coupling would not result in any leverage stress against a particular section or point of the gasket ring which might stress affect the effectiveness of the fluid-proofing properties of the gasket ring.
  • the number of ribs may range from 3 to 8, for example, and distributed equally around the inner tubular portion (28) surface.
  • the plurality of ribs (27) may also be profiled accordingly to provide a tight or snug fit around the pipe end (10) inserted into the inner tubular portion (28).
  • a key component of our pipe coupling assembly is the clinching sleeve (60) which is shown in isolation in FIGURE 8, FIGURES 9A - 9C and FIGURE 10 collectively.
  • the clinching sleeve (60) may be said to comprise of two parts, i.e. a ring portion (62) at one end and at the other end a plurality of clinching flaps (64) extending therefrom.
  • the ring portion (62) has a diameter that makes the ring portion (62) disposable within the outer tubular portion (30) of the body (20).
  • the ring portion (62)'s end is also provided with an abutment surface (66) for engaging or interfacing against the gasket ring (40) upon being seated on the annular surface (32) of the body (20).
  • Each of the clinching flaps (64) extending from the other end of the clinching sleeve (60) is provided with gripping means (68) at the flaps' inner surface.
  • the clinching flaps (64) are preferably distributed to encircle the pipe end (10).
  • yet another component of our pipe coupling assembly is the coupling nut (80) which is provided with internal threading (82) along an inner opening (84) at one end.
  • the internal threading (82) is provided complementary to the tubular body's (20) external threading (34).
  • the coupling nut (80) is provided with an outer opening (86) having an diameter that is sufficient to admit a pipe end (l ⁇ ) to be inserted therethrough.
  • a protrusion (38) is provided on the inner surface of the outer tubular portion (30) of the body (20) and a protuberance (78) is provided on the outer surface of the clinching sleeve ring portion (62) such that the protrusion (38) and the protuberance (78) mutually cooperates to abut each other at some point in the turning so that the clinching sleeve's (60) turning is limited to less than a turn.
  • FIG. 9B and FIG. 9C Another embodiment of the clinching sleeve limiting turning within the body (20) is shown in FIG. 9B and FIG. 9C.
  • keyways (77) are provided on the clinching sleeve (60)'s ring portion (62) so that it may be inserted into the body with the protrusions (38) complementarily slotted into the keyways (77).
  • the protrusion (38) if designed to be sufficiently narrow, may be slidable within the width of the keyway (77), thus allowing for limited turning of the clinching sleeve (60) within the body as it is tightened. Turning should not be dispense with altogether because a limited turning allowed will assist in the O-ring interfacing with contacting surfaces of the body (20) and clinching sleeve for better fluid-proof sealing.
  • a plurality of keyways (77) is provided corresponding to a plurality of protrusion (38).
  • the plurality of keyways should complementarily match the positions of the protrusions (38) on the body (20).
  • six keyways (77) are provided to match the 3-fl.ap embodiment of the clinching sleeve shown in FIG. 9B and FIG. 9C, they should be provided mutually equidistant along the outer surface of said clinching sleeve ring portion (62) so that the 3 protrusions (38) on the body (20) are complementarity positioned to be inserted into corresponding keyways (77).
  • the turning of the clinching sleeve (60) in the body (20) is 1/6 turn or 60° which is optimal for tightening and yet allow for sliding compression of the Oring to achieve the desired sealing action on the contacting surfaces without exerting too much wear on the elastic polymeric material of the O -ring.
  • Another major advantage arising from this keyway configuration is that the clinching sleeve's diameter to suit the internal diameter of the body since the protuberance's (78) and the gap necessary for the protuberance's (78) interfacing are now abolished or considerably reduced.
  • a clinching sleeve (60) having larger diameter is relatively more robust and improve its interfacing with the inside surface of the body (20). With the gap between the clinching sleeve (60) and the body (20) reduced or abolished, the support for interfacing surfaces of the Oring is thus increased and fluid-proof sealing increased.
  • a plurality of clinching flaps (64) extending from the ring portion (62) wherein each of the clinching flaps (64) is provided with gripping means (68) at the flaps' inner surface.
  • the gripping means (68) are preferably provided as barb edges which tips define a circumference in which a pipe end may be inserted thereinto without much resistance arising from cutting or scrapping of the pipe end surface as the pipe end (l ⁇ ) is pushed through the encircling clinching flaps (64) and through the ring portion (62).
  • the barb edges of the gripping means (68) may either be sharp edges capable of cutting, nicking or lacerating into the pipe end surface to provide a strong grip, or with blunt or rounded edges of a profile that is just sufficient to provide a firm grip on the pipe end without defacing the surface.
  • the variation or range between sharp cutting edges and rounded edges profile of the barbs will depend on the material of the pipe to be coupled, fluid pressure to be contained, degree of leakages tolerable, the pipe joint's integrity required (e.g. whether the pipe is subjected to stress test of pulling out of the coupling) and whether quick decoupling and recoupling is required (e.g. where nicking or lacerating of the pipe end would be undesirable since it might be rendered unsuitable for recoupling due to the defaced pipe end) and so forth.
  • each of the clinching flap (64) end is provided as having its corners and edges rounded (65).
  • the cutting or space between flaps is also preferably rounded (67) or provided as a U-shape cut as well.
  • Such rounding of edges and corners will reduce the incidences of these points nicking or scrapping onto adjoining or abutting components be it the pipe end (l ⁇ ), gasket ring (40) or tubular body (20) which may result in unnecessary obstruction or rough insertion of parts, causing damage to abutting component, etc.
  • such feature may reduce material cracking as the flaps (64) are flexed during stress arising from pipe end (10) insertion and/or tightening of the clinching sleeve around the pipe end when the coupling nut (80) is tightened.
  • the extent of the U-shape cut (67) may also be varied between the 3 or 4 cuts
  • FIGURE 1OF shows an example of such a clinching i o sleeve (60) provided with varying extent of the U-shape cuts (67).
  • Yet another feature of the clinching sleeve (60) provided for ease of flexure of the clinching flaps (64) is the thinning of the base of the clinching flap (64) at the ring portion (62) such as that shown in FIG. 8 and FIG. 9A as square
  • 30 surface (66) should preferably be rounded (72) as shown in FIGURE 1OA.
  • the abutment surface (66) may be provided as a raised, rounded circumferential lip (73) as shown in FIGURE 1OB.
  • This raised and rounded circumferential lip (73) may be more effective in abutting the gasket ring and keeping the edges (72), which may have been rounded though, from directly contacting the gasket ring.
  • Yet a further improvement to this abutment surface (66) may be made by provided the raised, rounded circumferential lip with a concave surface (74) as shown in FIGURE 1OC.
  • the raised, rounded and concave surface by having concave profile conforms to the gasket ring's surface, will ensure a complementarily opposing seating surface on the side of the clinching sleeve for the gasket ring to be securely seated in the annular surface (32) of tubular body (20).
  • the most preferred embodiment of the abutment surface (66) of the clinching sleeve is providing the circumferential concave surface (75) to be contoured to cover an inner or lower segment of the gasket ring's (40) segment (42) as illustrated in FIGURE 10D.
  • the word "lower” is a relative term in that should the gasket ring is laid on a horizontal plane and the clinching sleeve is inserted into a vertically-oriented tubular body (20) and approaches the gasket ring from the bottom.
  • Another perspective of this embodiment may be described as providing the circumferential concave surface (75) as contoured to cover about an inner, lower quadrant of the gasket ring's (40) surface in cross-sectional view.
  • outwardly-oriented concave surface (75) may be seen as effective in seating the gasket ring by providing an outwardly or expansive translation of force from the clinching sleeve so that the gasket ring (20) is compressed outwardly against the annular surface (32) in the body (20), a geometric inversion or mirror image of such concave surface (75) may also be possible.
  • the clinching sleeve's ring portion edge may be provided with an inwardly-oriented concave surface (76), as shown in FIGURE 1OE, so that the gasket ring (20) is compressed inwardly or constrictively around the pipe end surface when the clinching sleeve is tightened and pushed into the 5 body (20).
  • the abutment surface (66) of the clinching sleeve (60) is capable of many variation in contour and profile to provide an effective abutment and compressive surface against the elastic nature of the polymeric gasket ring seated in the tubular ring (20)'s annular surface (32). Another point to be issued is in respect of the phrase "to be seated" used in referring to
  • the inner circumferential opening of the clinching sleeve (60) may be tapered slightly (79) outwardly to ease the gasket ring's abutting the 3 different contacting surfaces at the juncture, i.e. against the tubular 25 body's annular surface (32), clinching sleeve's abutment surface (66) and with the pipe end (12) surface. It may be noted that the provision of this tapering (79) may either be outwardly or inwardly and is optional in case any one of the following circumstances arises or advantages to be taken.
  • the tapering (79) may be provided for flexural compensation when the clinching flaps (64) are pushed inwardly, such that the pipe-contacting surface of the ring portion (62) inner surface remains flat on the pipe end (l ⁇ ) surface.
  • this tapering (79) would also be advantageous.
  • Another situation where the tapering is useful is in providing grip on the pipe end (10) surface by the ring portion (62) of the clinching sleeve (60) which otherwise would only have gripping means provided at its outer end, i.e. the clinching flaps (64)
  • the final essential component of our pipe coupling to be described is the coupling nut (80) which is collectively depicted in FIGURE 11 in external view, and FIGURE 12A in cross-sectional view.
  • One preferred feature of the coupling nut is having ribs (84) that run longitudinally along the nut's external surface from the inner opening (84) to cover at least part of the neck portion (83). These longitudinal ribs (84) provide reinforcement to the coupling nut structure as well as grip to the user hand or tool in turning and fastening the nut along its internal threading (82) to cooperate with the tubular body's (20) external threading (34).
  • One or more bumps (29) may be provided in the root (or in between crests) of the body's (20) external threading.
  • one or more depression (89) may also be provided along the crest of the coupling nut's internal threading such that in the tightened threading between the two mutually cooperating threading, the bump (29) may be snugly seated in the depression (89) and thus avoid loosening of the threading.
  • This bump-in-depression engagement is similar to the tongue-in- groove engagement in that the features may also be provided vice versa between the cooperating parts, e.g. the bump (29) may be provided on the inner threading of the coupling nut (80) and the depression on body's external threading.
  • the provision of the depression (89) may cause a click sound as the bump (29) winds over the tightening and drops snugly into the depression (89).
  • a plurality of depressions (89) may be provided along the tightening threading so that the corresponding click sounds made by the bump engaging each depression in series may indicate the various positions of engagement.
  • the first click may indicate the position of the pipe coupling being preassembled and ready for insertion of the pipe end while subsequent clicks indicate the tightening of the coupling nut (80) over the clinching sleeve (60).
  • the depressions are not provided on the threading but the tightening portion of the threading is instead provided as thinned crests such that the tightening of the nut coupling would cause the bump to deform the thinned crests at the tightened end of travel of the bump on the crest and thus create a corresponding depression.
  • FIGURE 13 and FIGURE 14 respectively show by way of comparison the pre- tightening assembly of the pipe coupling and the tightened assembly wherein the barbs are shown to have clinched upon the pipe end surface.
  • tubular body (20), clinching sleeve (60) and coupling nut (80) many of the features described herein may be provided only on one of the components and used with conventional components. Similarly, features that require cooperation of two or more components may also be effective employed in conventional couplings by provided the feature only on one of the components. Accordingly, we have endeavoured to provide for claims directed to individual components such as the clinching sleeve, body and coupling nut without forsaking the unity of our invention and which are to be considered as falling within our general inventive concept. This inclusive coverage statement also covers our preassembled coupling in which one or more features may not be operational or effective until a pipe end has been inserted and tightened therein.

Abstract

L’invention concerne un raccord de tuyau comprenant un corps (20) qui constitue un conduit tubulaire permettant l’écoulement d’un fluide dans ce dernier d’une extrémité à une autre. Chaque extrémité est dotée d’une partie tubulaire interne dans laquelle une extrémité de tuyau (10, 12) peut être introduite. Le corps (20) comprend un filetage externe et une partie tubulaire externe présentant un diamètre plus grand que celui de la partie tubulaire interne, une surface annulaire s’étendant entre les parties tubulaires interne et externe. Une bague d’étanchéité (40) de diamètre approprié pour s’adapter autour de l’extrémité du tuyau (10, 12) est destinée à reposer sur la surface annulaire. Un manchon de rivetage (60) comprend une partie bague sur une extrémité dont le diamètre peut être introduit dans la partie tubulaire extérieure du corps (20) et former une surface venant en butée contre la bague d’étanchéité (40) lorsqu’elle repose. Une pluralité de volets de rivetage s’étendent depuis l’autre extrémité de la partie bague, chaque volet de rivetage de la surface intérieur étant pourvu de moyens de saisie répartis pour encercler l’extrémité du tuyau (10, 12). On utilise également un écrou de couplage doté d’une ouverture interne sur une extrémité avec un filetage interne complémentaire du filetage externe du corps, et une ouverture extérieure sur l’autre extrémité suffisante pour y introduire l’extrémité de tuyau.
PCT/MY2009/000110 2008-10-22 2009-07-31 Raccord de tuyau WO2010047573A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
NZ592253A NZ592253A (en) 2008-10-22 2009-07-31 A pipe coupling including gasket ring, deformable clinching sleeve and coupling nut
CN200980142195.0A CN102203490B (zh) 2008-10-22 2009-07-31 管联接器
AU2009307148A AU2009307148B2 (en) 2008-10-22 2009-07-31 A pipe coupling

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MYPI20084212 2008-10-22
MYPI20084212 2008-10-22

Publications (1)

Publication Number Publication Date
WO2010047573A1 true WO2010047573A1 (fr) 2010-04-29

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ID=42119488

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/MY2009/000110 WO2010047573A1 (fr) 2008-10-22 2009-07-31 Raccord de tuyau

Country Status (4)

Country Link
CN (1) CN102203490B (fr)
AU (1) AU2009307148B2 (fr)
NZ (1) NZ592253A (fr)
WO (1) WO2010047573A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
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JP2015031342A (ja) * 2013-08-02 2015-02-16 株式会社タブチ 継手
WO2015185882A1 (fr) * 2014-06-04 2015-12-10 Kutting Uk Limited Raccord
EP3064821A4 (fr) * 2014-07-31 2017-08-16 Jimten, S.A. Dispositif d'accouplement de tuyaux

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CN104806826A (zh) * 2015-04-16 2015-07-29 广东立丰管道科技有限公司 一种卡环双边锁紧的薄壁金属管管间连接件
US10859190B2 (en) * 2016-05-16 2020-12-08 Victaulic Company Sprung coupling
GB2554890B (en) * 2016-10-12 2019-01-02 Poulton Tech Limited A seal assembly
US10859122B2 (en) * 2017-08-25 2020-12-08 Kennametal Inc. Spline drive drill steel couplers
KR102110742B1 (ko) * 2018-04-06 2020-05-14 김병국 배관 연결 위치 결정이 용이한 배관 피팅장치

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KR860002108Y1 (ko) * 1984-05-29 1986-08-28 대우중공업 주식회사 관접 속부 구조
KR19980018537A (ko) * 1996-08-09 1998-06-05 이와나미 기요히사 수지제 관의 접속
KR20010000675U (ko) * 1999-06-16 2001-01-15 정호진 플렉시블관의 연결장치
EP1856418A1 (fr) * 2005-03-07 2007-11-21 Böhl, Harald Douille de serrage et liaison par serrage
KR20080059318A (ko) * 2005-11-29 2008-06-26 다이킨 고교 가부시키가이샤 관 조인트

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KR19980018537A (ko) * 1996-08-09 1998-06-05 이와나미 기요히사 수지제 관의 접속
KR20010000675U (ko) * 1999-06-16 2001-01-15 정호진 플렉시블관의 연결장치
EP1856418A1 (fr) * 2005-03-07 2007-11-21 Böhl, Harald Douille de serrage et liaison par serrage
KR20080059318A (ko) * 2005-11-29 2008-06-26 다이킨 고교 가부시키가이샤 관 조인트

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2015031342A (ja) * 2013-08-02 2015-02-16 株式会社タブチ 継手
WO2015185882A1 (fr) * 2014-06-04 2015-12-10 Kutting Uk Limited Raccord
US10550969B2 (en) 2014-06-04 2020-02-04 Kutting Uk Limited Connector
EP3064821A4 (fr) * 2014-07-31 2017-08-16 Jimten, S.A. Dispositif d'accouplement de tuyaux

Also Published As

Publication number Publication date
CN102203490A (zh) 2011-09-28
CN102203490B (zh) 2014-01-22
AU2009307148A1 (en) 2010-04-29
AU2009307148B2 (en) 2016-02-04
NZ592253A (en) 2013-07-26

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