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
  • F16L27/00—Adjustable joints, Joints allowing movement
  • F16L27/08—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe
  • F16L27/0804—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another
  • F16L27/0837—Adjustable joints, Joints allowing movement allowing adjustment or movement only about the axis of one pipe the fluid passing axially from one joint element to another the joint elements being bends
• • 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
  • F16L43/00—Bends; Siphons

Definitions

• the present invention relates to an apparatus, called arti ⁇ culated pipe coupling, and which is ' intended for interconnection of tubes, pipes and other components and which is formed so that movements and strains, which may appear in the said pipes or simi ⁇ lar devices are received by. the articulated pipe coupling.
• strains or torques may appear in the pipes.
• the said strains and torques especially affect the connection points between the pipes.
• the pipes are laid on uneven ground, sometimes since the pipes " must be brought to pass stone blocks, rocks and other elevated portions of the ground, whereby the pi ⁇ pes are heavily curved.
• the costs for. planning the substrate for the pipes by blasting, excavation etc are often so high that it should be advantageous to have the pipes follow the unevenesses instead.
• the invention foresees to use an articulated pipe coupling which is formed so that the movements, torques, strains etc. which tend to appear when laying the pipes are received only by the articulated pipe coupling.
• the coupling is formed with at least three pipe coupling portions which are rotatably connected to each other and which are formed so that the articulated pipe coupling as a whole can rotate in at least two directions which are perpendicular to each other, basically in the same way as a Cardan joint.
• Articulated pipe couplings of this type are known for in-
• the known pipe coupling com ⁇ prises two joint halves which are interconnected by means of a joint which is actuatable from outside, and in which each joint half is provided with a preferably rotatably connected connection for a tube.
• the previously known pipe joint involves some essen ⁇ tial disadvantages.
• the joint means actuatable from outside may be damaged if the pipe joint moves, for instance if the pipe joint depending on frequent movements scrapes against some hard object on the ground, in the earth or at the bottom of the see.
• the invention is concerned with an articulated pipe coupling which is formed for taking and eliminating movements, strains and torques etc. appearing in pipe-lines composed of seve ⁇ ral interconnected pipes, and in which the pipe coupling can take expansions, contractions and any other movements in the pipes, in which the pipe coupling as a whole has practically unrestricted flow area and the shortest possible bends, and in which the pipe coupling as a whole is formed with curved surfaces which both gi ⁇ ves a practically unreduced flow area through the entire coupling and allows a soft, 1aminary flow through the articulated pipe coup ⁇ ling.
• the articulated pipe coupling according to the invention com ⁇ prises a central spherically S-formed pipe bend which at each end has a coupling means in which a curved pipe bend is rotatably con- nected.
• the two curved pipe bends are rotatable in different pla ⁇ nes which are perpendicular to each other, for instance one pipe bend in the horizontal plane and the other pipe bend in the verti ⁇ cal plane, and the two curved pipe bends are connected to the S- formed central pipe bend by means of an inner screw joint.
• the in- ner screw joint may be formed so as to give a very little reduction of flow area through the articulated pipe coupling.
• Figure 1 1 shows an articulated pipe coupling according to the invention having pipes connected at each end thereof
• Figure 2 shows a cross-section through the articula ⁇ ted pipe coupling according to Figure 1 along line II - II.
• Figure 3 is an enlarged cross-sectional view of an additional ar ⁇ ticulated pipe joint which can additionally be connected at any of the ends of the pipe coupling.
• the articulated pipe coupling shown in Figures 1 and 2 is intended for interconnection of two pipes 1 and 2 so that move ⁇ ments of one pipe in relation to the other, strains in and between the pipes and torques between the pipes can be eliminated. This is made by the articulated pipe coupling, according to the invention which allows a rotation in all directions between the tubes 1 and 2.
• the articulated pipe coupling " comprises a spherically S- curved pipe bend 3 which at each end has a two-dimensionally curved pipe bend 4 and 5 rotatably connected thereto.
• the pipe bends are formed with sealing swivel flanges 6 and 7 respectively.
• the two swivel flanges 6 and 7. are provided into planes perpendicular to each other, for instance one swivel flange 6 for rotation in a horizontal plane and the second swivel flange 7 for rotation in a vertical plane.
• the pipes 1 and 2 can be laid at any angle to each other, and by providing two articulated pipe couplings according to the invention on some distance from each other also longitudinal movements in the axial direction bet ⁇ ween the pipes can be overcome by the pipe coupling.
• the two outer pipe bends 4 and 5 are formed with coupling flanges 8 and 9 for connection of the pipes 1 and 2 respectively in a conventional way.
• OMPI central pipe bend 3 and the two outer pipe bends 4 and 5 prefer ⁇ ably provided at the outside of the pipe bends in order not to occupy any portion of the total flow area.
• the pipe bends are formed with an even curved bend radius and thereby the pipe bends provide a smooth and even flow passageway which to a very small degree affects the flow through the pipes and the pipe bends and which gives an even and 1aminary flow-.
• the swivel couplings 6 and 7 between the central pipe bend 3 and the outer pipe bends 4 and 5 may be formed in different ways.
• the connection is made by an inner connection means which is shown in Figure 2.
• the central, spherically S- for ed pipe bend 3 is at each end formed with an outer slide ring half 10 extending round the entire pipe and having a male guide 11.
• the adherent outer pipe bend 4 (and 5 respectively) is at the end facing the central pipe bend 3 formed with a corresponding slide ring half 12 having a groove 13 for receiving the male guide 11 and on each side thereof a groove 14 and 15 for 0-ring seals 16 and 17.
• the said " slide ring half 12 also can be formed with a cover flange 18 for the slide ring surfaces.
• an inner coupl ng means comprising a central coupling tube 19 which is centrally mounted at the end of the S- " formed pipe bend 3 by means of four struts 20.
• the outer pipe bend 4 and 5 respectively is formed with a spring housing 21 which is mounted centrally at the end of the pipe bend 4 and 5 likewise by means of struts 22 and in a suitable location in relation to the coupling tube 19.
• a spring .23 is mounted and the spring is supported by the bottom of the spring housing 21.
• the coupling tube 19 is formed with inner threads, and the pipe bends 3, 4 and 3, 5 respectively are kept together by means of a bolt 24 with a nut 25 butt screwed to the nut 26 of the coupling tube 19.
• the compression spring 23 which is acting between the nuts 25 and 26 on one hand and the bottom of the spring housing 21 on the other hand thereby receives all movements which may appear between the slide ring halves 10 and 12.
• spacers 27 may be mounted between the
• the outer pipe bends 4 and 5 are formed with lids 28 which are sealingly mounted on the outer surface of the pipe bends. It is the intention to provide as straight flow line as pos ⁇ sible and for this purpose the outer pipe bends 4 and 5 are for ⁇ med as shown in Figure 2, whereby the coupling, flanges 8 and 9 are located substantially on the same axial line and whereby the pipes 1 and 2 in some positions of the articulated pipe coupling like- wise extend on the same axial line. Thereby an optimum straight and unrestricted flow movement of the flowing medium is obtained through the articulated pipe coupling.
• Each connected pipe, tube or other component can be rotated ⁇ in all directions without the risk of leakage of the passing liquid or gas fluid in the pipe coupling.
• the inner spring loaded screw joint gives a good sea ⁇ ling for the slide rings and by the double screw joint in the in-, ner screw connection means a large safety of ⁇ naterial is obtained, and the short and compact coupling means are protected against outer damage.
• the articulated pipe coupling is suited also for connection to heavy pipes for instance pipes for the transporta ⁇ tion of gas and oil at the bottom of the see, and by the pipe coupling the pipes can be laid substantially freely, whereby the pipes depending on the pipe coupling will follow the contour of the bottom of the see, and still no tension, pressure and torques between the pipes appear. Any raised and lowered portions of the bottom of the see are automatically equalized when laying the pipe line.
• the separate axial slide coupling 29 shown in Figure 3 can be connected to the coupling flange 8 or 9 at the outer pipe bends 4 and.5. Thereby it is also possible to rotate each pipe 1 or 2 along the axial line in addition to the overall movement bet ⁇ ween two interconnected pipes.

Landscapes

• Engineering & Computer Science (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• Joints Allowing Movement (AREA)

Applications Claiming Priority (1)

Publications (1)

Family

ID=20345752

Family Applications (1)

Country Status (3)

Families Citing this family (4)

Family Cites Families (6)

• 1982
  • 1982-07-28 AU AU87382/82A patent/AU8738282A/en not_active Abandoned
  • 1982-07-28 EP EP82902270A patent/EP0116033A1/de not_active Ceased
  • 1982-07-28 WO PCT/SE1982/000250 patent/WO1984000594A1/en not_active Application Discontinuation

Non-Patent Citations (1)

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