EP0076275A1 - Raccordement etanche de tubes en matiere plastique resistant aux forces de poussee - Google Patents

Raccordement etanche de tubes en matiere plastique resistant aux forces de poussee

Info

Publication number
EP0076275A1
EP0076275A1 EP82900936A EP82900936A EP0076275A1 EP 0076275 A1 EP0076275 A1 EP 0076275A1 EP 82900936 A EP82900936 A EP 82900936A EP 82900936 A EP82900936 A EP 82900936A EP 0076275 A1 EP0076275 A1 EP 0076275A1
Authority
EP
European Patent Office
Prior art keywords
socket connection
connection according
rolling elements
ring
sleeve
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Withdrawn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
EP82900936A
Other languages
German (de)
English (en)
Inventor
Georg Seiler
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.)
Individual
Original Assignee
Individual
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
Priority claimed from DE3112542A external-priority patent/DE3112542C2/de
Priority claimed from DE19813116803 external-priority patent/DE3116803A1/de
Application filed by Individual filed Critical Individual
Publication of EP0076275A1 publication Critical patent/EP0076275A1/fr
Withdrawn legal-status Critical Current

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
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
    • F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
    • F16L37/0845—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of retaining members associated with the packing member
    • 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
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
    • F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
    • F16L37/092—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector
    • F16L37/0925—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector with rings which bite into the wall of the pipe
    • 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
    • F16L37/00—Couplings of the quick-acting type
    • F16L37/08—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members
    • F16L37/084—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking
    • F16L37/092—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector
    • F16L37/0926—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members combined with automatic locking by means of elements wedged between the pipe and the frusto-conical surface of the body of the connector with an inner support sleeve arranged within the pipe
    • 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
    • F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
    • F16L47/08—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with sealing rings arranged between the outer surface of one pipe end and the inner surface of the sleeve or socket, the sealing rings being placed previously in the sleeve or socket

Definitions

  • the invention relates to a sealed and secured against shear forces socket connection on plastic tubes, in which a smooth cylindrical insertion end is accommodated with little play in a socket end, in which a Uraffang bead open to the tube axis is provided with an approximately triangular cross-section, in which a cross-section approximately wedge-shaped sealing ring with a plurality of clamping elements distributed in the circumferential direction and embedded in the sealing material can be inserted.
  • a combined sealing and thrust locking ring of this type is known from DE-OS 28 54 868.
  • a plurality of clamping pieces made of plastic arranged in the circumferential direction at larger intervals are provided as clamping elements, which have on their part-cylindrical inner surface a solid coating of grains which consist of a material which is harder than the plastic of the clamping pieces and the tubes and the tubular molded body.
  • the clamping pieces can have a circumferential bore through which a cord-like support element for the clamping pieces can be inserted or the material of the sealing element can be pressed into the bore in a cord-like manner through bore extensions.
  • the manufacture of the clamping pieces is relatively complex and leads to relatively high costs, which cannot always be tolerated in the case of a mass article.
  • the clamping pieces which are relatively large in volume, also require a sufficiently wide one. Circumferential distance to enable the clamping pieces to be securely embedded in the sealing ring. It can be seen that when plastic pipes (PVC) are clamped for longer periods of time under pressure, the material of the plastic pipes flows coldly into the spaces between adjacent clamping pieces, which gradually diminishes the clamping effect.
  • the inner circumferential surface of the clamping pieces must also be machined relatively precisely if the surface of the grains is to be sufficiently used.
  • a ring of rolling elements which are arranged essentially close to one another in the circumferential direction are embedded as clamping elements in the combined sealing and thrust securing ring. If a sealing ring is assumed, the circumference of which facing the pipe axis consists of two cross-sectional areas delimited in a partial circle in the axial direction, the ring of rolling elements is preferably arranged relative to the cross-sectional area delimited further axially on the outside in such a way that the pitch circle circumferences of this cross-sectional area of the sealing ring and substantially align the rolling elements in the circumferential direction.
  • the volume of the rolling elements which can consist of metal or plastic, is small compared to the known clamping pieces, so that the volume of the seal ring can perform the sealing function much better.
  • the small cross-sectional area of the rolling elements enables a substantially more favorable arrangement of these rolling elements, both within the cross-section of the sealing ring and in the circumferential direction, in which the rolling elements can be embedded practically close to one another in the sealing ring. This ensures that the gaps between successive circumferential surfaces of the rolling elements, which engage the insertion end of the tube, are extremely small, so that the material of the tubes cannot flow coldly in the clamping area. As a result, the clamping effect is maintained essentially unchanged even over long service lives.
  • the combined sealing and thrust locking ring is sufficiently flexible to be easily inserted into the circumferential bead of the sleeve end.
  • the circumferential surface of the rolling elements is roughened, in particular provided with a knurling which is designed in such a way that a notch effect at the insertion end cannot occur to the extent that there is a risk of damage, even under increased pressure.
  • the combined sealing and thrust retaining ring is dimensioned by nature so that it is inserted under pre-tension and is expanded by the smooth insertion end when the insertion end is inserted into the sleeve.
  • the rolling elements can be manufactured extremely cheaply and easily, and the preferred conical design of the end face can be produced directly when the individual rolling elements are tapped off from a correspondingly profiled rod material.
  • the rod material can have a longitudinal borehole from the outset, so that the rolling elements can also be threaded onto a cord-like supporting element if necessary. Due to the design of the clamping elements in the form of rolling elements, these can be arranged at a particularly favorable location on a profiled sealing ring.
  • the socket connection can also be developed in such a way that the thrust protection is retained to the full extent even over long standing times, without it being necessary to make the pipes in the connection area stronger, i.e. to train with greater wall thickness.
  • the plug-in end on its inside and the sleeve end on its outside can each be surrounded by a sleeve made of a dimensionally stable material of low cold flow capacity.
  • the invention concerns the shear protection on plastic tubes, which are much more sensitive to the notch effect and also show the special properties of the cold flow deformation of the tube material.
  • FIG. 1 shows a detail of a longitudinal section through one side of a pipe socket connection of the type in question.
  • Figure 2 shows a cross section through the sealing ring preferably used.
  • Figure 4 is a side view of an embodiment of the ring of rolling elements.
  • FIG. 6 shows a detail of a cross section through a reinforced sleeve connection according to the invention
  • Figure 1 shows the socket connection between a smooth insertion end 1 and the socket end 3 of plastic tubes.
  • the sleeve end 3 has a cylindrical extension 5, which is followed by a radially inwardly open bead 7 of essentially triangular cross section.
  • the bead has a steeper, shorter triangle leg 8 and a flat, inclined, longer leg 11.
  • the individual sections are connected to one another via radii of curvature 9, 10 and 12.
  • a short cylindrical end section 6 adjoins the bead, which is essentially aligned with the cylindrical section 5.
  • the free end edge 2 of the insertion end .1 lies opposite the inner shoulder 4 of the socket end at a short distance.
  • the clear width of the pipes is indicated with "D".
  • a sealing ring is inserted into the bead.
  • a sealing ring with the cross section as shown at 13 in FIG. 2 is preferred.
  • the substantially wedge-shaped sealing ring has an upper, thicker section 14 of a partially circular outline.
  • the center point "A" falls with the center of curvature of the radius 12 of the bead together, the radius of curvature 15 of the section 14 of the sealing ring being equal to or slightly larger than the radius of curvature 12.
  • a particularly effective sealing lip is formed by a circumferential groove 16 in the area of the largest radial dimension of the bead.
  • Section 14 is followed by a second region 17 of seal 13, which also has a part-circular outline.
  • the sealing ring 13 is delimited by a truncated cone surface 18.
  • the circumference of the rolling bodies 24 is preferably roughened, for example provided with knurling 25 following the surface lines.
  • the rolling elements can also have a central bore 26 into which a cord-like support element 27 e.g. is threaded out of rubber.
  • the frustoconical surface 18 is expediently in the region of the ring from. Rollers 24 withdrawn to the axis of the pipe connection, as indicated in Fig. 3 at 18a.
  • the outline of the bead is also indicated by dash-dotted lines through the boundary lines 21 and 22 of the insertion end and the socket end.
  • the end faces of the individual rolling bodies 24 are expediently frustoconical, as shown at 26a.
  • the rolling elements can be practically close to one another, at least in the relaxed state of the sealing ring 13 or 23. The widening when the insertion end 1 is inserted can result in small irregular distances between adjacent rolling elements, as is indicated at 30 and 31 in FIG. 4 .
  • the rolling bodies 35 can also be machined on their end faces in such a way that on one side there is a truncated cone surface 37 and on the other end face an undercut conical surface 36.
  • the end machining of the rolling elements takes place immediately when the rolling elements are cut off from a correspondingly profiled bar material. Post-processing is not necessary.
  • the rolling elements can be made of plastic or metal.
  • the bar material, from which the rolling elements are separated, is bent beforehand, preferably approximately according to a circular arc with a diameter approximately equal to the diameter of the plastic pipes.
  • the socket connection 101 shown in FIG. 6 corresponds to that of FIG. 1.
  • the following are designated: the smooth pipe end with 102, the socket end with 104, the rounded end face with 103, the groove open towards the pipe center with 105, the leg with 106 and 107 and the curvature section connecting them with 109.
  • the largest diameter of the sleeve is indicated with 115.
  • a sleeve 110 is drawn in inside the insertion end 102, which consists of a creep-resistant and metal-containing material, in particular metal.
  • the sleeve can be slightly widened, as indicated at 113, but the rounding of the end face 103 should be impaired and influenced as little as possible.
  • a bushing 114 made of creep-resistant and shape-retaining material is drawn onto the bead-shaped area of the sleeve end.
  • This also preferably consists of metal. It predominantly covers the longer, flatter leg 107 of the corrugation and extends to the area of the largest diameter 115 of the corrugation.
  • Both cuff-like bodies are firmly drawn in or drawn onto the surfaces in question with as little play as possible or shrunk on by the action of heat.
  • Corresponding adhesives can also be used to increase the connection. It is essential that the relevant wall sections of the pipe connection are firmly clamped by the sleeves. In order to secure the socket 114 even better in its position, it can have tongues 116 protruding from its free wide end, which converge towards the tube axis and snap over the area of the largest diameter 115 of the bead.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)

Abstract

Pour une fixation sure des raccords de tubes (101) en matiere plastique a l'encontre des forces axiales, des organes de roulement (24, 35) presentant des asperites peripheriques (25) sont loges dans un joint d'etancheite (13, 23). Sans mordre de facon exageree dans les sections de tube, ces organes n'autorisent pratiquement aucune deformation des extremites engagees (1, 107) a l'endroit du raccordement. Une douille (110) est logee a l'interieur de l'extremite male (1, 102) et une bague (114) recouvre la partie saillante (7) du manchon contenant le joint (13, 23).
EP82900936A 1981-03-30 1982-03-29 Raccordement etanche de tubes en matiere plastique resistant aux forces de poussee Withdrawn EP0076275A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
DE3112542 1981-03-30
DE3112542A DE3112542C2 (de) 1981-03-30 1981-03-30 Kombinierter Dichtungs- und Schubsicherungsring für Muffenverbindungen an Kunststoffrohren
DE19813116803 DE3116803A1 (de) 1981-04-28 1981-04-28 "abgedichtete und gegen schubkraefte gesicherte muffenverbindung an kunststoffrohren"
DE3116803 1981-04-28

Publications (1)

Publication Number Publication Date
EP0076275A1 true EP0076275A1 (fr) 1983-04-13

Family

ID=25792254

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82900936A Withdrawn EP0076275A1 (fr) 1981-03-30 1982-03-29 Raccordement etanche de tubes en matiere plastique resistant aux forces de poussee

Country Status (3)

Country Link
EP (1) EP0076275A1 (fr)
IT (1) IT1190749B (fr)
WO (1) WO1982003440A1 (fr)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2266569B (en) * 1992-04-29 1995-07-12 F W Talbot & Company Limited A connector
GB9314094D0 (en) * 1993-07-08 1993-08-18 Angell Jonathan G C Releasable coupling
GB2295431B (en) * 1993-07-08 1997-08-06 Jonathan George Cordy Angell Releasable coupling
RO113272B1 (ro) * 1993-09-16 1998-05-29 United States Pipe Foundry Garnitura de etansare
SE9404230L (sv) * 1993-12-07 1995-06-08 Dick Fernstroem Anordning vid rörboja
AR029663A1 (es) * 2000-05-23 2003-07-10 Dayco Products Llc Alma de conector y conjunto que comprende una manguera, un tubo y dicha alma de conector
JP5489843B2 (ja) * 2009-10-07 2014-05-14 株式会社クボタ 離脱防止機能付きシール材および離脱防止管継手
EP2664833B1 (fr) 2012-05-14 2016-04-27 Trelleborg Pipe Seals Lelystad BV Joint de retenue
US9951869B2 (en) 2015-02-04 2018-04-24 Trelleborg Pipe Seals Lelystad BV Seal for belled pipe

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1958205A1 (de) * 1969-11-19 1971-05-27 Georg Seiler Schubsicherung bei Muffenverbindungen von Rohren
US3915480A (en) * 1972-10-31 1975-10-28 Dresser Ind Pullout resistant pipe coupling member and gaskets therefor
GB1591305A (en) * 1976-09-23 1981-06-17 Yorkshire Imperial Plastics Pipe of oriented thermoplastic polymeric material and a method and apparatus for its manufacture

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO8203440A1 *

Also Published As

Publication number Publication date
IT8220474A0 (it) 1982-03-30
WO1982003440A1 (fr) 1982-10-14
IT1190749B (it) 1988-02-24

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Legal Events

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PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

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STAA Information on the status of an ep patent application or granted ep patent

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Effective date: 19830608