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WO1990013768A1 - Conduite a haute pression dont les elements sont interconnectes par des joints a tenon et mortaise et l'usage d'un tuyau a nervures - Google Patents

Conduite a haute pression dont les elements sont interconnectes par des joints a tenon et mortaise et l'usage d'un tuyau a nervures Download PDF

Info

Publication number
WO1990013768A1
WO1990013768A1 PCT/FI1990/000118 FI9000118W WO9013768A1 WO 1990013768 A1 WO1990013768 A1 WO 1990013768A1 FI 9000118 W FI9000118 W FI 9000118W WO 9013768 A1 WO9013768 A1 WO 9013768A1
Authority
WO
WIPO (PCT)
Prior art keywords
pipe
socket
ribs
pipes
pressure
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.)
Ceased
Application number
PCT/FI1990/000118
Other languages
English (en)
Inventor
Jyri Järvenkylä
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.)
Uponor NV
Original Assignee
Uponor 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 Uponor NV filed Critical Uponor NV
Publication of WO1990013768A1 publication Critical patent/WO1990013768A1/fr
Anticipated expiration legal-status Critical
Ceased 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
    • F16L37/12—Couplings of the quick-acting type in which the connection between abutting or axially overlapping ends is maintained by locking members using hooks, pawls, or other movable or insertable locking members
    • F16L37/14—Joints secured by inserting between mating surfaces an element, e.g. a piece of wire, a pin, a chain
    • F16L37/142—Joints secured by inserting between mating surfaces an element, e.g. a piece of wire, a pin, a chain where the securing element is inserted tangentially
    • F16L37/148—Joints secured by inserting between mating surfaces an element, e.g. a piece of wire, a pin, a chain where the securing element is inserted tangentially the securing element being flexible
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L25/00—Construction or details of pipe joints not provided for in, or of interest apart from, groups F16L13/00 - F16L23/00
    • F16L25/0036—Joints for corrugated pipes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L25/00—Construction or details of pipe joints not provided for in, or of interest apart from, groups F16L13/00 - F16L23/00
    • F16L25/0036—Joints for corrugated pipes
    • F16L25/0045—Joints for corrugated pipes of the quick-acting type

Definitions

  • This invention relates to a pressure pipeline, especially a pressure sewer pipeline to be laid under the surface of ground or water, comprising pipes and connecting pieces, such as branches, positioned one after another, the pipes and the connecting pieces being interconnected by means of socket-and-spigot joints, a socket comprising means and the outer sur- face of the pipe comprising grooves for a gasket and a locking means to lock the pipes and/or the connect ⁇ ing pieces together in their longitudinal direction.
  • Some sewer pipelines such as pressure sewer pipelines, convey pressurized medium.
  • the medium is pressurized, e.g., by feeding it into the pipelines by means of pumps.
  • Pressure in pressure sewer pipe ⁇ lines is typically between 3 and 4 bar.
  • a considerable vacuum may be created in the pipelines, e.g., when stopping the pumps.
  • the pipes and the connecting pieces have to be locked together to ensure that the parts remain stationary relative to each other during pressure impacts. As the parts should not either move relative to the surrounding earth, they have to be locked together over a distance sufficient to create a suf ⁇ ficient friction between the pipes and the earth to anchor the bend in place.
  • Pipes can be locked together and to the con ⁇ necting pieces by means of a prior art arrangement consisting of grooves provided in the inner surface of the socket and in the outer surface of the spigot.
  • the grooves are in alignment with each other and a locking band is arranged to extend into both of them. This arrangement locks the parts together in the direction of the longitudinal axis of the pipe.
  • a drawback of the prior art pressure pipes de- scribed above is the great number of joints to be locked as the friction between smooth plastic pipes and the surrounding earth is relatively low. In addition, the locking points are difficult to form.
  • the pipe has to be cut off, its spigot end has to be provided with a groove for the locking band, or a sleeve provided with such a groove has to be pushed on the pipe.
  • the object of the present invention is to provide a pressure pipeline in which the number of joints to be locked is decreased as compared with prior art pipelines and in which the locking points are considerably easier to form than previously.
  • the pressure pipeline of the invention is characterized in that the pipes are ribbed pipes and that both the gasket and the locking means are positioned in the grooves between ribs.
  • the pressure pipeline consists of ribbed pipes
  • a much greater friction force is created be ⁇ tween the pipeline and the surrounding earth, where- fore the number of pipe parts to be locked together can be considerably decreased, that is, the number of locking points is smaller than in prior art pipes.
  • the cutting of the pipe does not hamper the locking of the parts as the outer surface of the ribbed pipe comprises peripheral grooves over the length of the pipe. Accordingly, the spigot end need not be provided with a groove for the locking band or the gasket.
  • the number of the locking rings and the gaskets is also easy to optimize in connection with the installation.
  • ribbed pipes in pressure sewers is an advan ⁇ tage in that the ribs give the pipe a great ring stiffness, which prevents inward buckling of the pipe under the influence of a vacuum prevailing inside the pipe, so that the dimensions of the walls of the pipe can be selected according to the demands of the internal pressure.
  • the pumping pressure typically applied in sewers varies between 2 and 4 bar.
  • a suf- ficient dimension pressure is 6 bar.
  • a smooth 6-bar PVC pipe buckles as its ring stiffness is only about 9 kN/m .
  • a smooth PVC pipe having a suffi- cient ring stiffness, that is, about 16 kN/m , and a diameter of NS 200 weighs about 13.4 kg/m.
  • a cor- responding ribbed pipe of equal rigidity and suffi ⁇ cient pressure resistance (6 bar) weighs only 10 to 11 kg/m, so the ribbed pipe is also more economical to produce.
  • ribbed pipes is especially advantageous when reasonable pressure resistance, good buckling strength and lockable joints are needed simultaneously.
  • the locking means is a flexible band or rod of a diameter greater than the height of the ribs.
  • the locking means thereby project from a groove between the ribs, extending into a groove in the inner wall of the socket, so that the parts are locked together longitudinally of the pipe.
  • Ribbed pipes are known per se from, e.g., US-A- 3 998 579.
  • One typical embodiment is a buried sewage fall pipe with a thin wall and high narrow ribs. Such a thin wall can be used because fall pipes are not pressurized and the high ribs give a sufficient ring stiffness against the pressure of the earth.
  • the volume ratio between the inner wall and the ribs in this kind of pipe varies from about 1 to 1.5/1.
  • the ribs are straight.
  • the clearing angle of the ribs is thereby typically about 4° or less.
  • One preferred embodiment of the invention is characterized in that the volume of the wall of the ribbed pipe is more than twice the material volume of the ribs, that the ribs of the ribbed pipe are trapezoidal in cross-section and that the angle of their side relative to a plane perpendicular to the longitudinal direction of the pipe is in the range from 5° to 45°, preferably about 35°.
  • Ribs so shaped also improve the pressure resistance of the pipe.
  • the strongly wedge-shaped groove between the ribs causes the internal pressure of the pipe to press the gasket efficiently against the socket with the result that the sealing effect is improved with increasing pressure.
  • Figure 1 is a longitudinal sectional view of a socket-and-spigot joint between a pipe and a con ⁇ necting piece
  • Figure 2 is a cross-sectional view along the line II...II of Figure 1;
  • Figure 3 is a longitudinal sectional view of another embodiment of the invention.
  • the drawings show a portion of a pressure pipeline consisting of a spigot end 1 of a pipe and a socket 2 of a connecting piece, such as a branch or a double-socket.
  • the parts 1, 2 are preferably made of plastic and interconnected by a socket-and-spigot joint by inserting the spigot end 1 of the pipe into the socket 2.
  • the pipeline of the invention is intended to convey pressurized liquid, such as waste water, the pressure ranging typically from about 2 to 5 bar. Vacuum may also intermittently occur in the pipeline.
  • the pipeline is buried in earth or immersed in water and it may also act as a water suction and discharge pipeline conveying cooling water, for instance.
  • a gasket 3 provided between the outer surface of the spigot and the inner surface of the socket for sealing the joint is sufficient. If required, two gaskets positioned in adjacent grooves can be used. The two gaskets are of different materials, one of them being resistant to oil and the other withstanding microbiological attack. At points such as bends, valves and branches, where the pipe walls are exposed to extra pressures caused by the flowing liquid, the spigot and the socket have to be locked to prevent the opening of the joint.
  • the number of locked joints between the pipes can be considerably decreased and their forming can be simplified by con ⁇ structing the pipeline by means of ribbed pipes and by positioning the locking means between the spigot and the socket in the grooves between the ribs of the ribbed pipes.
  • the grooves are used as sealing grooves as well.
  • Peripheral ribs 4 are provided in the outer surface of the spigot end 1 of the pipe, grooves 5 being positioned between the ribs.
  • the inner surface of the socket 2 is also provided with peripheral grooves 6 to be positioned in alignment with the grooves 5 of the spigot.
  • the number of the grooves 6 corresponds to the number of the locking means.
  • the locking means of the joint are positioned in the aligned grooves 5, 6 of the spigot and the socket.
  • the locking means are formed by flexible rods 7 of relatively stiff plastic, for instance, and of a diameter greater than the height of the ribs 4, the rods extending from the grooves 5 of the spigot to the grooves 6 of the socket.
  • the rods are inserted in place through holes 8 provided in the wall of the socket in such a manner that they go round the whole spigot.
  • the ribs 4 are trapezoidal in shape while the sides are straight or, as in the figure, curved.
  • the ribs are compact, and the angle of their side relative to a plane perpendicular to the longitudinal direction of the pipe is from 5° to 45°, preferably about 35°.
  • the volume of the pipe wall is more than twice the material volume of the ribs.
  • a ribbed pipe is easy to optimize for use in pressure pipelines. The same does not apply to con ⁇ ventional smooth pipes. As pressure causes peripheral tensile stresses, it is preferable to strengthen the inner pipe with long fibres a major part of which are peripherally oriented to increase breaking strength in this direction. Since the function of the ribs is to increase the ring stiffness, the load situation is quite different in the ribs.
  • the joint shown in the figures is formed by fitting the gasket into the groove of the spigot 1 of a ribbed pipe and inserting the spigot into the socket 2.
  • the pipe may be cut first, if required. At least one rod 7 is then pushed through the hole 8 of the socket into a cavity formed by the grooves 5 and 6 so that it goes round the spigot.
  • the grooves 6 of the socket may be omitted, and the locking effect of the holes 8 only is relied on.
  • the rods 7 may be re- placed with some other similar locking means, such as a band. This way of locking has the advantage that it can be easily seen from the bands whether the joint is locked or not.
  • the above-described locking arrangement between the pipe and the socket may be replaced by projec ⁇ tions provided in the inner surface of the socket.
  • the projections extend into the grooves 5 of the pipe, thus locking the parts together (snap-on locking).
  • the locking arrangement may also be replaced with a piston-ring type plastic ring fitted on the socket.
  • the plastic ring comprises a locking pin or locking pins to be inserted through the hole of the socket wall between the ribs of the spigot.
  • a strap 9 shown in Figure 3 The strap extends in the direction of its width to the side of the spigot and is also posi ⁇ tioned between the ribs of the spigot. A socket with lowered ribs is used in this case.
  • the socket 2 may extend over at least four grooves 5, whereby it is possible to use two gaskets 3 and two locking rods 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Sewage (AREA)

Abstract

Cette invention concerne une conduite à haute pression dont les éléments (1, 2) sont interconnectés par des joints à tenon et mortaise. Dans les conduites à haute pression connus de l'état de la technique, la force de frottement entre la conduite et la terre environnante est petite, donc plusieurs conduites doivent être calées ensemble dans la direction longitudinale de la conduite, par exemple dans les courbes. De tels joints calés sont difficiles à fabriquer. Le nombre de joints est réduit et les joints sont plus faciles à fabriquer si les tuyaux (1) sont des tuyaux à nervures et des moyens de blocage (7) sont placés dans des fentes (5) entre les nervures (4).
PCT/FI1990/000118 1989-04-28 1990-04-26 Conduite a haute pression dont les elements sont interconnectes par des joints a tenon et mortaise et l'usage d'un tuyau a nervures Ceased WO1990013768A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FI892042A FI83984C (fi) 1989-04-28 1989-04-28 Tryckledning.
FI892042 1989-04-28

Publications (1)

Publication Number Publication Date
WO1990013768A1 true WO1990013768A1 (fr) 1990-11-15

Family

ID=8528328

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/FI1990/000118 Ceased WO1990013768A1 (fr) 1989-04-28 1990-04-26 Conduite a haute pression dont les elements sont interconnectes par des joints a tenon et mortaise et l'usage d'un tuyau a nervures

Country Status (3)

Country Link
AU (1) AU5449290A (fr)
FI (1) FI83984C (fr)
WO (1) WO1990013768A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0444857A1 (fr) * 1990-02-28 1991-09-04 Senior Flexonics Limited Arrangement de raccord
DE202013103804U1 (de) * 2013-08-22 2014-11-24 Richard Weinhold Kupplungsanordnung, insbesondere Rohrkupplung
CN108775462A (zh) * 2018-08-16 2018-11-09 广东科朗管道修复技术有限公司 一种可快速安装管道
EP3587887A1 (fr) * 2018-06-29 2020-01-01 Varco I/P Inc. Système de raccordement de tuyau composite à haute pression

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU673494B3 (en) * 1996-02-14 1996-11-07 Ameron, Inc. High-pressure fiber reinforced composite pipe joint

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2219194A1 (fr) * 1971-04-21 1972-11-02
FR2206471A1 (fr) * 1972-11-15 1974-06-07 Hemscheidt Maschf Hermann
CH569915A5 (en) * 1973-06-13 1975-11-28 Huber F & Co Socket-type pipe coupling - has anchoring device which passes through female end to secure male end
US3998579A (en) * 1973-10-22 1976-12-21 Nordstroem Erik G W Device for producing externally ribbed pipes of plastic
US4423891A (en) * 1981-09-28 1984-01-03 Menges William H Corrugated hose coupling
DE3642149A1 (de) * 1986-01-09 1987-07-16 Geberit Ag Rohrkupplung zum verbinden der enden von zwei rohren
WO1988008784A1 (fr) * 1987-05-14 1988-11-17 Wavin B.V. Tube en plastique ayant des nervures transversales solides sur la surface exterieure, dispositif de moulage prevu a cet effet, installation comprenant un tel dispositif et procede de moulage d'un tube en plastique

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2219194A1 (fr) * 1971-04-21 1972-11-02
FR2206471A1 (fr) * 1972-11-15 1974-06-07 Hemscheidt Maschf Hermann
CH569915A5 (en) * 1973-06-13 1975-11-28 Huber F & Co Socket-type pipe coupling - has anchoring device which passes through female end to secure male end
US3998579A (en) * 1973-10-22 1976-12-21 Nordstroem Erik G W Device for producing externally ribbed pipes of plastic
US4423891A (en) * 1981-09-28 1984-01-03 Menges William H Corrugated hose coupling
DE3642149A1 (de) * 1986-01-09 1987-07-16 Geberit Ag Rohrkupplung zum verbinden der enden von zwei rohren
WO1988008784A1 (fr) * 1987-05-14 1988-11-17 Wavin B.V. Tube en plastique ayant des nervures transversales solides sur la surface exterieure, dispositif de moulage prevu a cet effet, installation comprenant un tel dispositif et procede de moulage d'un tube en plastique

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0444857A1 (fr) * 1990-02-28 1991-09-04 Senior Flexonics Limited Arrangement de raccord
US5201554A (en) * 1990-02-28 1993-04-13 Senior Flexonics Limited Swivel coupling with corrugated tube, o-ring seal and split ring clip
DE202013103804U1 (de) * 2013-08-22 2014-11-24 Richard Weinhold Kupplungsanordnung, insbesondere Rohrkupplung
EP3587887A1 (fr) * 2018-06-29 2020-01-01 Varco I/P Inc. Système de raccordement de tuyau composite à haute pression
US20200003343A1 (en) * 2018-06-29 2020-01-02 Varco I/P, Inc. High pressure composite pipe joining system
US11703170B2 (en) 2018-06-29 2023-07-18 Varco I/P, Inc. High pressure composite pipe joining system
CN108775462A (zh) * 2018-08-16 2018-11-09 广东科朗管道修复技术有限公司 一种可快速安装管道

Also Published As

Publication number Publication date
AU5449290A (en) 1990-11-29
FI892042L (fi) 1990-10-29
FI83984B (fi) 1991-06-14
FI892042A0 (fi) 1989-04-28
FI83984C (fi) 1991-09-25

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