EP1188016A1 - Sealing tip for tubular conduit - Google Patents

Sealing tip for tubular conduit

Info

Publication number
EP1188016A1
EP1188016A1 EP01929721A EP01929721A EP1188016A1 EP 1188016 A1 EP1188016 A1 EP 1188016A1 EP 01929721 A EP01929721 A EP 01929721A EP 01929721 A EP01929721 A EP 01929721A EP 1188016 A1 EP1188016 A1 EP 1188016A1
Authority
EP
European Patent Office
Prior art keywords
sealing
duct
plug
conduit
peripheral shoulder
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Withdrawn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
EP01929721A
Other languages
German (de)
French (fr)
Inventor
Claude Trichard
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.)
Novoplastic SA
Original Assignee
Novoplastic SA
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 Novoplastic SA filed Critical Novoplastic SA
Publication of EP1188016A1 publication Critical patent/EP1188016A1/en
Withdrawn legal-status Critical Current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
    • F16L55/00—Devices or appurtenances for use in, or in connection with, pipes or pipe systems
    • F16L55/10—Means for stopping flow from or in pipes or hoses
    • F16L55/11—Plugs
    • F16L55/1108—Plugs fixed by screwing or by means of a screw-threaded ring

Definitions

  • the present invention relates to the technical field of transport networks for energy fluids, or signals.
  • These transport networks include installation conduit elements connected end to end inside which cables, pipes or wires are arranged.
  • Such a network can be terrestrial or underwater.
  • the present invention relates more particularly to a sealing end piece for an installation duct, or an installation duct element.
  • installation duct is meant any plastic tube, for example high density polyethylene (HDPE), sealed from the outside with respect to liquids, and from the inside, screws -to any fluid, including under pressure.
  • HDPE high density polyethylene
  • Such a tube is also rigid enough to withstand mechanically any load, such as the weight of an earth column due to the burial of the installation duct, and flexible enough to be handled, for example wound on a reel.
  • the installation duct elements In order to store or transport the installation duct elements before their connection, they can be filled with a liquid, for example pressurized air, for example at 0.5 bar, then closed at their two ends respectively . This makes it possible in particular to compensate for the embrittlement of said conduits, linked to the increase in their temperature, by exposure to the sun for example.
  • a liquid for example pressurized air, for example at 0.5 bar
  • the installation conduits having, for example, a tubular shape produced with a plastic material of the HDPE type are generally black in color.
  • the duct elements are often stored or transported outside, and their black color favors the absorption of solar radiation, thus favoring their heating. It is not uncommon for such conduits to reach temperatures of the order of 60 ° C, thus softening their constituent material.
  • the object of the present invention therefore aims to achieve in a simple manner the sealing of installation duct elements to withstand during their transport and storage at high mechanical stresses and in particular at high internal pressures.
  • the sealing end piece comprises: - a plug comprising a tapered frustoconical part whose thread is for example self-tapping, capable of being when it is screwed into one end of the plastic conduit;
  • a handling head having a peripheral shoulder in the extension of the plug, said peripheral shoulder being arranged to come opposite a edge of the edge of an opening of the duct,
  • the object assigned to the present invention is also achieved by means of a method for closing a tubular installation pipe made of plastic material, for transport and storage, consisting in sealing the ends of said pressurized pipe or intended to be pressurized.
  • the method consists in:
  • An advantage of the sealing end piece according to the invention lies in the fact that it makes it possible to seal outside the duct, thus increasing the simplicity of construction and its reliability.
  • Another remarkable advantage lies in the fact that the sealing end piece makes it possible to maintain the sealing, even when it is subjected to high pressures. Another advantage lies in the fact that the sealing is carried out on the edge of the duct, which is able to withstand a significant axial force on the part of the sealing end piece.
  • sealing nozzle Another advantage of the sealing nozzle is linked to its great simplicity of use and its adaptability to deviations or fluctuations in the internal diameter of the various installation conduits.
  • FIG. 1 shows an embodiment of a sealing tip according to the invention, shown in exploded view and in perspective;
  • FIG. 2 shows an axial sectional view of a sealing nozzle according to Figure 1, mounted on an installation duct;
  • FIG. 3 shows a sectional view of an alternative embodiment of the sealing tip according to the invention.
  • FIG. 4 is another method of mounting the nozzle according to the invention.
  • the sealing end piece 2 shown in FIG. 1 comprises a tapered tapered plug 4.
  • the latter has a self-tapping thread 6 making it possible to dig a helical thread inside an installation duct 1, when said plug 4 is screwed into one end of the duct 1.
  • the sealing tip 2 also includes a handling head 8, which has a peripheral shoulder 10 in the coaxial extension.
  • the peripheral shoulder 10 is intended to come opposite a edge 1a of the opening to be closed off from the duct 1.
  • the sealing end piece 2 also comprises an annular seal 1 2 shown in FIG. 1, and disposed in a groove 30 formed between the head 8 and the threaded part of the plug 4.
  • the annular seal 1 2 is, for example, a O-ring whose constituent material is chosen from viscoelastic materials, for example elastomer.
  • the handling head 8 is externally provided with a knurling 14 substantially parallel to a longitudinal axis (y-y ') of the duct 1. Knurling 14 can also be replaced by flats (not shown).
  • the handling head 8 can comprise a hooking means. The latter is, for example a transverse bore 1 6.
  • the plug 4 is extended at its free end 18 with a hooking ring 20.
  • the sealing end piece 2 is preferably made in a single hollow part obtained by molding or injection of a technical plastic material.
  • the material constituting the sealing end piece 2 is preferably chosen from materials of the technical polymer plastic type, loaded or not.
  • the sealing tip 2 comprises a pressurizing valve 22 mounted on the free end 1 8, constituting the small base of the frustoconical part threaded plug 4.
  • the pressurizing valve 22 thus makes it possible to introduce compressed air inside the duct 1, when the latter is already closed with the sealing ends 2.
  • the pressurizing valve 22 is centered in the plug 4, and one of its ends 22a is screwed into the free end 1 8, passing through the plastic wall to come into communication with the interior volume of the conduit 1.
  • the other end 22b of the pressurizing valve 22 remains accessible and protected by the handling head 8.
  • FIG. 2 is a sectional view, passing through the longitudinal axis (y-y ') of the conduit 1.
  • FIG. 2 represents the sealing end piece 2 screwed and therefore mounted in one end of the duct 1.
  • the conduit 1 thus has an internal surface 1b, cylindrical, which is tapped over a certain length at its end, thanks to the self-tapping thread 6. The latter is encrusted at least partly in the material of the conduit 1 flush according to the internal surface 1 b. An intimate mechanical connection is thus obtained between the duct 1 and the plug 4.
  • the present invention also relates to a method for closing a plastic installation pipe 1, for the storage and transport of the latter.
  • This method consists in sealingly closing the ends of the conduit 1, which is pressurized or intended to be pressurized with any suitable fluid.
  • the method consists in cutting the end of the conduit 1 transversely to its longitudinal axis (y-y '), in order to obtain a edge 1 a whose annular surface, devoid of roughness, extends in a plane orthogonal to the longitudinal axis (yy ').
  • Devices for cutting the conduits 1 in this way are known as such.
  • the method also consists in using a sealing tip 2 for each end of the duct 1, and in screwing each plug 4 into the corresponding end of the duct 1 in the axial direction F.
  • the annular seal 1 2 is compressed between the peripheral shoulder 1 0 and the corresponding edge 1 a, in the axial direction F, by completing the screwing operation. A sealed obturation of the duct 1 is thus obtained, both pneumatically and hydraulically.
  • a cylindrical ring 50 is placed externally on the end of the installation duct 1.
  • the ring 50 has for example an internal shoulder resting on the edge 1a, so as to avoid slipping on the duct 1 during its installation.
  • the ring 50 for example metallic, is mounted on the duct 1 before the sealing piece is screwed into the opening of the duct 1. This avoids the creep of the plastic material of the conduit 1, in particular when said conduits 1 are pressurized for a long period, for example of storage. Sealing and pressurization are then better ensured over time.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Pipe Accessories (AREA)
  • Gasket Seals (AREA)
  • Protection Of Pipes Against Damage, Friction, And Corrosion (AREA)
  • Joints With Pressure Members (AREA)

Abstract

The invention concerns a sealing tip (2) for a tubular installation conduit (1) comprising: a plug (4) including a threaded tapered part whereof the thread (6) is for example self-tapping, capable of being screwed into the end of a plastic conduit (1) end; a manipulating head (8) with a peripheral shoulder (10) in the extension of said plug (4), said peripheral shoulder (10) being arranged to be urged opposite an edge (1a) of the rim of an opening of the conduit (1); and an annular joint (12) arranged against the peripheral shoulder (10).

Description

EMBOUT D'ETAIMCHEITE POUR CONDUIT TUBULAIRE TIPPING TIP FOR TUBULAR CONDUIT
La présente invention se rapporte au domaine technique des réseaux de transport de fluides d'énergie, ou de signaux. Ces réseaux de transport comprennent des éléments de conduit d'installation raccordés bout à bout à l'intérieur desquels sont disposés des câbles, tuyaux ou fils.The present invention relates to the technical field of transport networks for energy fluids, or signals. These transport networks include installation conduit elements connected end to end inside which cables, pipes or wires are arranged.
Un tel réseau peut être terrestre ou subaquatique.Such a network can be terrestrial or underwater.
La présente invention concerne plus particulièrement un embout d'étanchéité pour un conduit d'installation, ou un élément de conduit d'installation. Par "conduit d'installation", on entend tout tube en matière plastique, par exemple en polyéthylène haute densité (PEHD), étanche par rapport à l'extérieur vis-à-vis des liquides, et par rapport à l'intérieur, vis-à-vis de tout fluide, y compris sous pression. Un tel tube est par ailleurs suffisamment rigide pour résister mécaniquement à toute charge, telle que le poids d'une colonne de terre due à l'enfouissement du conduit d'installation, et suffisamment souple pour être manipulé, par exemple enroulé sur un touret.The present invention relates more particularly to a sealing end piece for an installation duct, or an installation duct element. By "installation duct" is meant any plastic tube, for example high density polyethylene (HDPE), sealed from the outside with respect to liquids, and from the inside, screws -to any fluid, including under pressure. Such a tube is also rigid enough to withstand mechanically any load, such as the weight of an earth column due to the burial of the installation duct, and flexible enough to be handled, for example wound on a reel.
Afin de stocker ou de transporter les éléments de conduit d'installation avant leur raccordement, ceux-ci peuvent remplis avec un liquide, par exemple de l'air sous pression, par exemple à 0,5 bars, puis obturés à leurs deux extrémités respectivement. Ceci permet en particulier de pallier à la fragilisation desdits conduits, liée à l'augmentation de leur température, par exposition au soleil par exemple.In order to store or transport the installation duct elements before their connection, they can be filled with a liquid, for example pressurized air, for example at 0.5 bar, then closed at their two ends respectively . This makes it possible in particular to compensate for the embrittlement of said conduits, linked to the increase in their temperature, by exposure to the sun for example.
En effet, les conduits d'installation présentant, par exemple, une forme tubulaire réalisée avec un matériau plastique du type PEHD sont généralement de couleur noire.In fact, the installation conduits having, for example, a tubular shape produced with a plastic material of the HDPE type are generally black in color.
Les éléments de conduit sont souvent stockés ou transportés à l'extérieur, et leur couleur noire favorise l'absorption du rayonnement solaire, favorisant ainsi leur échauffement. Il n'est pas rare que de tels conduits atteignent des températures de l'ordre de 60° C, ramollissant ainsi leur matériau constitutif.The duct elements are often stored or transported outside, and their black color favors the absorption of solar radiation, thus favoring their heating. It is not uncommon for such conduits to reach temperatures of the order of 60 ° C, thus softening their constituent material.
Cette augmentation de température fragilise donc les éléments de conduit, lesquels peuvent s'écraser, notamment lorsqu'ils sont entassés sur une aire de stockage ou sur un camion. La pressurisation interne permet d'éviter ce problème d'écrasement, mais cet échauffement augmente substantiellement la pression à l'intérieur de ces conduits. A titre d'exemple, la pression interne peut atteindre 3 à 5 bars. De telles pressions peuvent conduire à une dilatation progressive des conduits et par conséquent à un défaut d'étanchéité entre les moyens d'obturation et lesdits conduits. Les moyens d 'obturation utilisés aux deux extrémités doivent donc résister à des pressions internes élevées, et l'étanchéité vis-à-vis de l'intérieur doit être maintenue pour de telles pressions.This increase in temperature therefore weakens the duct elements, which can collapse, in particular when they are piled up on a storage area or on a truck. The internal pressurization avoids this crushing problem, but this heating substantially increases the pressure inside these conduits. AT for example, the internal pressure can reach 3 to 5 bars. Such pressures can lead to a progressive expansion of the conduits and consequently to a leakage between the sealing means and said conduits. The sealing means used at the two ends must therefore withstand high internal pressures, and the seal vis-à-vis the interior must be maintained for such pressures.
L'objet de la présente invention vise donc à réaliser de façon simple l'étanchéité d'éléments de conduit d'installation pour résister au cours de leur transport et de leur stockage à des contraintes mécaniques importantes et en particulier à des pressions internes élevées.The object of the present invention therefore aims to achieve in a simple manner the sealing of installation duct elements to withstand during their transport and storage at high mechanical stresses and in particular at high internal pressures.
L'objet assigné à la présente invention est atteint à l'aide d ' un embout d'étanchéité pour conduit d'installation de forme tubulaire. Selon l'invention, l'embout d'étanchéité comporte : - un bouchon comportant une partie tronconique filetée dont le filetage est par exemple auto taraudant, susceptible d'être lorsqu'elle est vissée dans une extrémité du conduit en matière plastique ;The object assigned to the present invention is achieved by means of a sealing nozzle for installation duct of tubular shape. According to the invention, the sealing end piece comprises: - a plug comprising a tapered frustoconical part whose thread is for example self-tapping, capable of being when it is screwed into one end of the plastic conduit;
- une tête de manipulation présentant un epaulement périphérique dans le prolongement du bouchon, ledit epaulement périphérique étant agencé pour venir en regard d'un chant de la bordure d'une ouverture du conduit,a handling head having a peripheral shoulder in the extension of the plug, said peripheral shoulder being arranged to come opposite a edge of the edge of an opening of the duct,
- et un joint annulaire disposé contre l'épaulement périphérique.- And an annular seal placed against the peripheral shoulder.
L'objet assigné à la présente invention est également atteint à l'aide d'un procédé pour obturer un conduit d'installation tubulaire en matière plastique, pour le transport et le stockage, consistant à obturer de façon étanche les extrémités dudit conduit pressurisé ou destiné à être pressurisé.The object assigned to the present invention is also achieved by means of a method for closing a tubular installation pipe made of plastic material, for transport and storage, consisting in sealing the ends of said pressurized pipe or intended to be pressurized.
Selon l'invention, le procédé consiste à :According to the invention, the method consists in:
- couper l'extrémité du conduit transversalement à son axe longitudinal (y-y' ), afin d 'obtenir un chant dont la surface annulaire, dépourvue d'aspérités, s'étend dans un plan orthogonal à l'axe longitudinal (y-y' ) ;- cut the end of the duct transversely to its longitudinal axis (y-y '), in order to obtain a edge whose annular surface, devoid of asperities, extends in a plane orthogonal to the longitudinal axis (y-y');
- à utiliser un embout d'étanchéité selon l'une quelconque des revendications 1 à 9, pour ladite extrémité du conduit ;- to use a sealing tip according to any one of claims 1 to 9, for said end of the conduit;
- à visser le bouchon dans l'extrémité correspondante du conduit selon une direction axiale (F) ; - et à comprimer le joint annulaire entre l'épaulement périphérique et le chant ( 1 a) correspondant selon la direction axiale (F), en terminant l'opération de vissage de l'étape précédente.- to screw the plug into the corresponding end of the duct in an axial direction (F); - And compressing the annular seal between the peripheral shoulder and the edge (1 a) corresponding in the axial direction (F), completing the screwing operation of the previous step.
Un avantage de l'embout d'étanchéité conforme à l'invention réside dans le fait qu'il permet de réaliser l'étanchéité à l'extérieur du conduit, augmentant ainsi la simplicité de construction et sa fiabilité.An advantage of the sealing end piece according to the invention lies in the fact that it makes it possible to seal outside the duct, thus increasing the simplicity of construction and its reliability.
Un autre avantage remarquable réside dans le fait que l'embout d'étanchéité permet de conserver l'étanchéité, même lorsqu'il est soumis à des pressions élevées. Un autre avantage réside dans le fait que l'étanchéité est réalisée sur le chant du conduit, lequel est en mesure de supporter un effort axial important de la part de l'embout d'étanchéité.Another remarkable advantage lies in the fact that the sealing end piece makes it possible to maintain the sealing, even when it is subjected to high pressures. Another advantage lies in the fact that the sealing is carried out on the edge of the duct, which is able to withstand a significant axial force on the part of the sealing end piece.
Un autre avantage de l'embout d'étanchéité est lié à sa grande simplicité d'utilisation et à son adaptabilité à des écarts ou à des fluctuations du diamètre interne des différents conduits d 'installation.Another advantage of the sealing nozzle is linked to its great simplicity of use and its adaptability to deviations or fluctuations in the internal diameter of the various installation conduits.
D'autres caractéristiques et avantages ressortiront également de la description détaillée, ci-jointe à titre d'exemple non limitatif, en référence aux dessins annexés dans lesquels :Other characteristics and advantages will also emerge from the detailed description, attached by way of nonlimiting example, with reference to the appended drawings in which:
- la figure 1 représente un exemple de réalisation d'un embout d'étanchéité conforme à l'invention, montré en vue éclatée et en perspective ;- Figure 1 shows an embodiment of a sealing tip according to the invention, shown in exploded view and in perspective;
- la figure 2 représente une vue en coupe axiale d'un embout d'étanchéité selon figure 1 , monté sur un conduit d'installation ;- Figure 2 shows an axial sectional view of a sealing nozzle according to Figure 1, mounted on an installation duct;
- la figure 3 représente une vue en coupe d'une variante de réalisation de l'embout d'étanchéité conforme à l'invention ;- Figure 3 shows a sectional view of an alternative embodiment of the sealing tip according to the invention;
- la figure 4 est un autre mode de montage de l'embout conforme à l'invention.- Figure 4 is another method of mounting the nozzle according to the invention.
L'embout d'étanchéité 2 représenté à la figure 1 comporte un bouchon 4 tronconique fileté. Ce dernier présente un filetage 6 auto- taraudant permettant de creuser un filet hélicoïdal à l'intérieur d'un conduit d'installation 1 , lorsque ledit bouchon 4 est vissé dans une extrémité du conduit 1 .The sealing end piece 2 shown in FIG. 1 comprises a tapered tapered plug 4. The latter has a self-tapping thread 6 making it possible to dig a helical thread inside an installation duct 1, when said plug 4 is screwed into one end of the duct 1.
L'embout d 'étanchéité 2 comporte également une tête de manipulation 8, laquelle présente un epaulement périphérique 10 dans le prolongement coaxial. L'épaulement périphérique 10 est destiné à venir en regard d 'un chant 1 a de l'ouverture à obturer du conduit 1 . L'embout d'étanchéité 2 comporte également un joint annulaire 1 2 montré sur la figure 1 , et disposé dans une gorge 30 ménagée entre la tête 8 et la partie filetée du bouchon 4. Le joint annulaire 1 2 est, par exemple, un joint torique dont le matériau constitutif est choisi parmi les matériaux viscoélastiques, par exemple élastomère.The sealing tip 2 also includes a handling head 8, which has a peripheral shoulder 10 in the coaxial extension. The peripheral shoulder 10 is intended to come opposite a edge 1a of the opening to be closed off from the duct 1. The sealing end piece 2 also comprises an annular seal 1 2 shown in FIG. 1, and disposed in a groove 30 formed between the head 8 and the threaded part of the plug 4. The annular seal 1 2 is, for example, a O-ring whose constituent material is chosen from viscoelastic materials, for example elastomer.
La tête de manipulation 8 est pourvue extérieurement d'un moletage 14 sensiblement parallèle à un axe longitudinal (y-y' ) du conduit 1 . Le moletage 14 peut également être remplacé par des méplats (non représentés). Avantageusement, la tête de manipulation 8 peut comporter un moyen d'accrochage. Ce dernier est, par exemple un perçage transversal 1 6.The handling head 8 is externally provided with a knurling 14 substantially parallel to a longitudinal axis (y-y ') of the duct 1. Knurling 14 can also be replaced by flats (not shown). Advantageously, the handling head 8 can comprise a hooking means. The latter is, for example a transverse bore 1 6.
Selon un exemple de réalisation conforme à l'invention, le bouchon 4 se prolonge à son extrémité libre 1 8 avec un anneau d'accrochage 20.According to an exemplary embodiment according to the invention, the plug 4 is extended at its free end 18 with a hooking ring 20.
L'embout d'étanchéité 2 est de préférence réalisé en une seule pièce creuse obtenue par moulage ou injection d'une matière plastique technique. Le matériau constitutif de l'embout d'étanchéité 2 est de préférence choisi parmi les matériaux du type matière plastique polymère technique, chargée ou non.The sealing end piece 2 is preferably made in a single hollow part obtained by molding or injection of a technical plastic material. The material constituting the sealing end piece 2 is preferably chosen from materials of the technical polymer plastic type, loaded or not.
Selon un autre exemple de réalisation conforme à l'invention et représenté à la figure 3, l'embout d'étanchéité 2 comprend une valve de mise sous pression 22 montée sur l'extrémité libre 1 8, constituant la petite base de la partie tronconique filetée du bouchon 4. La valve de mise sous pression 22 permet ainsi d'introduire de l'air comprimé à l'intérieur du conduit 1 , lorsque ce dernier est déjà obturé avec les embouts d'étanchéité 2. La valve de mise sous pression 22 est centrée dans le bouchon 4, et l'une 22a de ses extrémités est vissée dans l'extrémité libre 1 8, en traversant la paroi en matière plastique pour venir en communication avec le volume intérieur du conduit 1 . L'autre extrémité 22b de la valve de mise sous pression 22 demeure accessible et protégée par la tête de manipulation 8.According to another embodiment according to the invention and shown in Figure 3, the sealing tip 2 comprises a pressurizing valve 22 mounted on the free end 1 8, constituting the small base of the frustoconical part threaded plug 4. The pressurizing valve 22 thus makes it possible to introduce compressed air inside the duct 1, when the latter is already closed with the sealing ends 2. The pressurizing valve 22 is centered in the plug 4, and one of its ends 22a is screwed into the free end 1 8, passing through the plastic wall to come into communication with the interior volume of the conduit 1. The other end 22b of the pressurizing valve 22 remains accessible and protected by the handling head 8.
La figure 2 est une vue en coupe, passant par l'axe longitudinal (y-y') du conduit 1 . La figure 2 représente l'embout d 'étanchéité 2 vissé et donc monté dans une extrémité du conduit 1 . Le conduit 1 présente ainsi une surface interne 1 b, cylindrique, laquelle est taraudée sur une certaine longueur à son extrémité, grâce au filetage auto-taraudant 6. Ce dernier vient s'incruster au moins en partie dans le matériau constitutif du conduit 1 affleurant selon la surface interne 1 b. On obtient ainsi une liaison mécanique intime entre le conduit 1 et le bouchon 4.Figure 2 is a sectional view, passing through the longitudinal axis (y-y ') of the conduit 1. FIG. 2 represents the sealing end piece 2 screwed and therefore mounted in one end of the duct 1. The conduit 1 thus has an internal surface 1b, cylindrical, which is tapped over a certain length at its end, thanks to the self-tapping thread 6. The latter is encrusted at least partly in the material of the conduit 1 flush according to the internal surface 1 b. An intimate mechanical connection is thus obtained between the duct 1 and the plug 4.
L'étanchéité, tant vis-à-vis de l'intérieur que de l'extérieur du conduit 1 , est obtenue avec la compression du joint annulaire 1 2 entre le chant 1 a du conduit 1 et l'épaulement périphérique 1 0. Cette compression s'obtient par l'intermédiaire du vissage de l'embout d'étanchéité 2 dans le conduit 1 et ce, selon une direction axiale F matérialisée sur la figure 2.The tightness, both vis-à-vis the inside and the outside of the duct 1, is obtained with the compression of the annular seal 1 2 between the edge 1 a of the duct 1 and the peripheral shoulder 1 0. This compression is obtained by screwing the sealing nozzle 2 into the duct 1 and this, in an axial direction F materialized in FIG. 2.
La présente invention se rapporte également à un procédé d'obturation d 'un conduit 1 d'installation en matière plastique, pour le stockage et le transport de ce dernier. Ce procédé consiste à obturer de façon étanche des extrémités du conduit 1 , lequel est pressurisé ou destiné à être pressurisé avec tout fluide approprié.The present invention also relates to a method for closing a plastic installation pipe 1, for the storage and transport of the latter. This method consists in sealingly closing the ends of the conduit 1, which is pressurized or intended to be pressurized with any suitable fluid.
Selon l'invention, le procédé consiste à couper l'extrémité du conduit 1 transversalement à son axe longitudinal (y-y'), afin d 'obtenir un chant 1 a dont la surface annulaire, dépourvue d'aspérités, s'étend dans un plan orthogonal à l'axe longitudinal (y-y' ) . Des dispositifs pour couper les conduits 1 de la sorte sont connus en tant que tels.According to the invention, the method consists in cutting the end of the conduit 1 transversely to its longitudinal axis (y-y '), in order to obtain a edge 1 a whose annular surface, devoid of roughness, extends in a plane orthogonal to the longitudinal axis (yy '). Devices for cutting the conduits 1 in this way are known as such.
Le procédé consiste également à utiliser un embout d'étanchéité 2 pour chaque extrémité du conduit 1 , et à visser chaque bouchon 4 dans l'extrémité correspondante du conduit 1 selon la direction axiale F.The method also consists in using a sealing tip 2 for each end of the duct 1, and in screwing each plug 4 into the corresponding end of the duct 1 in the axial direction F.
Grâce au procédé selon l'invention, le joint annulaire 1 2 se trouve comprimé entre l'épaulement périphérique 1 0 et le chant 1 a correspondant, selon la direction axiale F, en terminant l'opération de vissage. On obtient ainsi une obturation étanche du conduit 1 , tant sur le plan pneumatique qu'hydraulique.Thanks to the method according to the invention, the annular seal 1 2 is compressed between the peripheral shoulder 1 0 and the corresponding edge 1 a, in the axial direction F, by completing the screwing operation. A sealed obturation of the duct 1 is thus obtained, both pneumatically and hydraulically.
Selon un mode de montage de l'embout d 'étanchéité représenté à la figure 4, une bague 50 cylindrique est mise en place extérieurement sur l'extrémité du conduit 1 d'installation. La bague 50 présente par exemple un epaulement interne prenant appui sur le chant 1 a, de manière à éviter un glissement sur le conduit 1 lors de sa mise en place. La bague 50 par exemple métallique, est montée sur le conduit 1 avant le vissage de l'embout d 'étanchéité dans l'ouverture du conduit 1 . On évite ainsi le fluage de la matière plastique du conduit 1 , en particulier lorsque lesdits conduits 1 sont pressurisés pendant une longue période, par exemple de stockage. L'étanchéité et la pressurisation sont alors mieux assurées dans le temps. According to a method of mounting the sealing nozzle shown in FIG. 4, a cylindrical ring 50 is placed externally on the end of the installation duct 1. The ring 50 has for example an internal shoulder resting on the edge 1a, so as to avoid slipping on the duct 1 during its installation. The ring 50, for example metallic, is mounted on the duct 1 before the sealing piece is screwed into the opening of the duct 1. This avoids the creep of the plastic material of the conduit 1, in particular when said conduits 1 are pressurized for a long period, for example of storage. Sealing and pressurization are then better ensured over time.

Claims

REVENDICATIONS
1 . Embout d'étanchéité (2) pour conduit ( 1 ) d'installation de forme tubulaire caractérisé en ce qu'il comporte :1. Sealing end piece (2) for installation pipe (1) of tubular shape, characterized in that it comprises:
- un bouchon (4) comportant une partie tronconique filetée dont le filetage (6) est par exemple auto taraudant, susceptible d'être vissée dans une extrémité du conduit ( 1 ) en matière plastique ;- a plug (4) comprising a tapered frustoconical part, the thread (6) of which is for example self-tapping, capable of being screwed into one end of the conduit (1) made of plastic;
- une tête de manipulation (8) présentant un epaulement périphérique ( 1 0) dans le prolongement du bouchon (4), ledit epaulement périphérique ( 1 0) étant agencé pour venir en regard d'un chant ( 1 a) de la bordure d'une ouverture du conduit ( 1 ) ;- A handling head (8) having a peripheral shoulder (1 0) in the extension of the plug (4), said peripheral shoulder (1 0) being arranged to come opposite a song (1 a) of the edge d 'an opening of the duct (1);
- et un joint annulaire ( 1 2) disposé contre l'épaulement périphérique ( 10) .- And an annular seal (1 2) disposed against the peripheral shoulder (10).
2. Embout d'étanchéité (2) selon la revendication 1 caractérisé en ce que la tête de manipulation (8) est pourvue extérieurement d'un moletage ( 14) sensiblement parallèle à l'axe longitudinal (y-y") .2. Sealing nozzle (2) according to claim 1 characterized in that the handling head (8) is provided externally with a knurling (14) substantially parallel to the longitudinal axis (y-y ").
3. Embout d 'étanchéité (2) selon la revendication 1 ou 2, caractérisé en ce que la tête de manipulation (8) comporte un moyen d'accrochage.3. Sealing tip (2) according to claim 1 or 2, characterized in that the handling head (8) comprises a hooking means.
4. Embout d 'étanchéité (2) selon l'une quelconque des revendications 1 à 3, caractérisé en ce que la partie tronconique du bouchon (4) se prolonge à son extrémité libre ( 1 8) par un anneau d'accrochage (20) .4. sealing tip (2) according to any one of claims 1 to 3, characterized in that the frustoconical part of the plug (4) is extended at its free end (1 8) by a hooking ring (20 ).
5. Embout d'étanchéité (2) selon l'une quelconque des revendications 1 à 4, caractérisé en ce qu' il est réalisé de manière monobloc selon une pièce creuse obtenue par moulage.5. Sealing nozzle (2) according to any one of claims 1 to 4, characterized in that it is produced in a single piece according to a hollow part obtained by molding.
6. Embout d 'étanchéité (2) selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'il comprend une valve de mise sous pression (22) permettant de pressuriser le conduit ( 1 ) sur lequel elle est ou sera montée. 6. sealing tip (2) according to any one of claims 1 to 6, characterized in that it comprises a pressurizing valve (22) for pressurizing the conduit (1) on which it is or will be climb.
7. Embout d'étanchéité (2) selon la revendication 6, caractérisé en ce que la valve de mise sous pression (22) est vissée dans la petite base de la partie tronconique filetée du bouchon (4) . 7. Sealing fitting (2) according to claim 6, characterized in that the pressurizing valve (22) is screwed into the small base of the tapered frustoconical part of the plug (4).
8. Procédé d'obturation d'un conduit (1 ) d'installation tubulaire en matière plastique, pour le stockage et le transport, consistant à obturer de façon étanche au moins une extrémité du conduit ( 1 ), pressurisé ou destiné à être pressurisé, caractérisé en ce qu' il consiste à : - couper l'extrémité du conduit (1 ) transversalement à son axe longitudinal (y-y'), afin d'obtenir un chant ( 1 a) dont la surface annulaire, dépourvue d'aspérités, s'étend dans un plan orthogonal à l'axe longitudinal (y-y') ;8. Method for closing a conduit (1) of tubular plastic installation, for storage and transport, consisting in sealingly sealing at least one end of the conduit (1), pressurized or intended to be pressurized , characterized in that it consists in: - cutting the end of the duct (1) transversely to its longitudinal axis (y-y '), in order to obtain a edge (1a) whose annular surface, devoid of asperities, extends in a plane orthogonal to the longitudinal axis (y-y ');
- à utiliser un embout d'étanchéité (2) selon l'une quelconque des revendications 1 à 9, pour ladite extrémité du conduit (1 ) ;- to use a sealing end piece (2) according to any one of claims 1 to 9, for said end of the duct (1);
- à visser le bouchon (4) dans l'extrémité correspondante du conduit ( 1 ) selon une direction axiale (F) ;- screwing the plug (4) into the corresponding end of the duct (1) in an axial direction (F);
- et à comprimer le joint annulaire ( 1 2) entre l'épaulement périphérique ( 10) et le chant ( 1 a) correspondant selon la direction axiale (F), en terminant l'opération de vissage de l'étape précédente. - And compress the annular seal (1 2) between the peripheral shoulder (10) and the edge (1 a) corresponding in the axial direction (F), completing the screwing operation of the previous step.
EP01929721A 2000-04-27 2001-04-26 Sealing tip for tubular conduit Withdrawn EP1188016A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0005415A FR2808257B1 (en) 2000-04-27 2000-04-27 SEALING TIP FOR TUBULAR DUCT
FR0005415 2000-04-27
PCT/FR2001/001287 WO2001081813A1 (en) 2000-04-27 2001-04-26 Sealing tip for tubular conduit

Publications (1)

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EP1188016A1 true EP1188016A1 (en) 2002-03-20

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EP01929721A Withdrawn EP1188016A1 (en) 2000-04-27 2001-04-26 Sealing tip for tubular conduit

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US (1) US6688336B2 (en)
EP (1) EP1188016A1 (en)
CN (1) CN1366592A (en)
AU (1) AU5641901A (en)
BR (1) BR0104592A (en)
CA (1) CA2376434A1 (en)
FR (1) FR2808257B1 (en)
HU (1) HUP0202083A2 (en)
IL (1) IL147151A0 (en)
MX (1) MXPA01012640A (en)
TN (1) TNSN01064A1 (en)
WO (1) WO2001081813A1 (en)

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Also Published As

Publication number Publication date
AU5641901A (en) 2001-11-07
BR0104592A (en) 2002-04-23
FR2808257A1 (en) 2001-11-02
CA2376434A1 (en) 2001-11-01
IL147151A0 (en) 2002-08-14
MXPA01012640A (en) 2002-11-04
WO2001081813A1 (en) 2001-11-01
TNSN01064A1 (en) 2003-04-03
HUP0202083A2 (en) 2002-10-28
CN1366592A (en) 2002-08-28
US6688336B2 (en) 2004-02-10
US20010054800A1 (en) 2001-12-27
FR2808257B1 (en) 2002-09-06

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